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harpazo1965 wrote:Can you please show me by uploading a picture here (any picture) and showing me the step by step process? Is there a YouTube channel that explains how to do this? I learn best through video clips.
Sorry, I can't give any practical help because I only have a PC and laptop, not a smartphone.
Try this search on YouTube: "How to copy image url on android". That brings up many tutorials, and hopefully you'll find one that suits.
However, that will take some doing! Some have presenters with very strong accents, some in non-English, some with awful music and no vocals, some with irrelevant introductory content to ignore...etc, etc.
I couldn't find a really good video tutorial, but here are two of the better ones (though not all that easy to follow!):
how to copy Google images into url in android (many positive comments from posters)
How To Copy Image Link From Google In Mobile (positive poster comments, but one said this: "Well but you don't need to open image in new tab you can simply press on preview image and copy the link")I found the first one easier to understand, but for your purposes, it really starts at the 1:00 minute mark. You'll probably need to watch it several times. Also, you may need to pause & replay some sections where the presenter's too quick, so that you can see the particular action she's performed on her phone.
I had thought that amnkb's tutorial would've got you over the line...
I thank you for your effort and time. Let me see what I can do.
Bob wrote:I've tried a number of reliable maths sites and none have a concept 'quadratic prime'.
i think it means prime polynomial
thats any polynomial that isn't factorable over the integers
so x^2+1 is prime, but x^2-1 isn't
Michael Sullivan provided one sample using a binomial. I will post his example as a guide for you to figure out this trinomial on my next day off. Keep in mind that Saturday is my Monday and it begins with a double shift. Tomorrow another double with 3 hours of sleep in between due to distance. Ever has an insane schedule like this?
Show that x^2 + x + 1 is prime.
Is this meaning for all x ∈ {+integers} x^2 + x + 1 is a prime number?
Counter example x = 18 gives 343 which is not prime.
So if the question doesn't mean this, what does it mean?
I've tried a number of reliable maths sites and none have a concept 'quadratic prime'.
Bob
Michael Sullivan provided one sample using a binomial. I will post his example as a guide for you to figure out this trinomial on my next day off. Bob, keep in mind that Saturday is my Monday and it begins with a double shift. Tomorrow another double with 3 hours of sleep in between due to distance. Ever has an insane schedule like this?
harpazo1965 wrote:I came across an interesting question in Section R.5 for which Sullivan does not provide a sample question for.
Show that x^2 + x + 1 is prime.
has the book covered the quadratic formula yet?
if yes, then set equal to zero and show quadratic formula has no real solutions
if no, then use that x^2 = x*x and 1 = 1*1 so any factors have to be (x [sign] 1)
try (x - 1)(x - 1), (x + 1)(x + 1), and (x + 1)(x - 1)
when none of them works then quadratic is prime
Let me see what I can do.
amnkb wrote:...got url with file extension: https://i.imgur.com/t5wC8Hg.jpeg...
...replace with .jpeg
(yes it has to be jpEg, not jpg)...Actually, the image extension can be any of '.gif', '.jpeg', '.jpg', '.png' (and probably more). These all work:
https://i.imgur.com/t5wC8Hg.gif
https://i.imgur.com/t5wC8Hg.jpeg
https://i.imgur.com/t5wC8Hg.jpg
https://i.imgur.com/t5wC8Hg.pngThe important thing when copying an image url is that the link you're copying must refer to an 'image address' (ie, with an 'image extension' as above), not something else like a 'link address'.
Btw, the direct Imgur url to an actual image begins https://i.imgur.com... ('i.' signifying it's an image link, I suppose).
Can you please show me by uploading a picture here (any picture) and showing me the step by step process? Is there a YouTube channel that explains how to do this? I learn best through video clips.
harpazo1965 wrote:Nothing pops up telling me to select image in new tab.
I also don't see _d in my url. Back to the drawing board.so apparently its browser-specific
on my android it works using the 'carbon' browser
it doesn't work using 'samsung internet' browser
what're you using?
I have an android AS 21 T-Mobile phone. This is as far as I am going to play with stuff. I joined this site to discuss mathematics not to learn about browsers or url problems or cookies, or uploading issues etc.
harpazo1965 wrote:Let me see.
12,997 ÷ 24 = 541.54166666667
541 x 24 = 12,984
12,997 - 12,984 = 13
so there are 13 hrs left over after taking the 541 full days out
harpazo1965 wrote:What time (CST) will it be 12,997 later?
I say 1pm.
You say?
yeah
12 hrs after noon is midnight
1 hr after midnight is 1am
Ok. Looks good.
harpazo1965 wrote:...my work and answer.
https://i.imgur.com/TZdv1iQ.jpeg
looks good to me
also they both multiply out to the same thing
Did you post my picture?
I don't recall posting this picture.
My cell phone does not accept imgur for some strange reason.
harpazo1965 wrote:Everything I do online is done on my android cell phone which is a few years old. Get it?
got it
so i got this to work on my not new android:go to the page with your image
long-press until a menu pops up
select 'open image in new tab' (or new window)
go to the url
delete the _d and anything after that
replace with .jpeg
(yes it has to be jpEg, not jpg)
copy the corrected link into your posthope that helps
(if it doesnt please say where it goes wrong
i'm home sick and so bored
youd be doing me a favor giving me somthing to do)
Nothing pops up telling me to select image in new tab.
I also don't see _d in my url. Back to the drawing board.
Let me see what I can do.
harpazo1965 wrote:Bob wrote:If you have a recurring decimal it is always possible to turn it into a fraction.
eg.
0.16161616......
let a/b = 0.16161616.....
100a/b = 16.16161616.....
Subtract
99a/b = 16a/b = 16/99
I do have one question.
You said subtract but there is no subtraction symbol in your work.
its hard to show without formatting
subtracting a/b = 0.16161616... 100(a/b) = 16.16161616... 100(a/b) = 16.16161616... -1(a/b) = -0.16161616... ------------------------- 99(a/b) = 16 a/b = 16/99
Interesting problem for which Sullivan does not give a sample.
harpazo1965 wrote:Bob wrote:I used Wolfram Alpha https://www.wolframalpha.com/input?i=fa … 2+-+x+-+2+
and it has no easy factors. Are you sure you have it copied correctly?
Yes, the question is exactly as stated in the book.
Here are the instructions:
Factor completely. If the polynomial cannot be factored, say it is prime.
https://i.imgur.com/roSPSKl.jpeg
This is question 119 in the textbook.
The textbook answer is (x - 1)(x + 1)(x + 2).if you multiply that back out you get
you factored pairs to get to here
but these dont have common factors so nothing can be pulled out front
i think the book typoed the first minus; it was supposed to be plus
I also think there is a typo for this question.
The textbook answer is (x - 1)(x + 1)(x + 2).
It doesn't make sense.
harpazo1965 wrote:https://i.imgur.com/YzIqVO3.jpeg
There is no difference between the formula you provided and the textbook x^3 - a^3 = (x - a)(x^2 + ax + a^2). So, I don't understand your comment about me being confused. I didn't go further in my work.
Let x = (3x - 2)
the line above is where you use "x" to mean 2 different things: the placeholder in the factorisation formula and also the variable from the original expression
taken literally it says
harpazo1965 wrote:When I plug this into your formula and Sullivan's formula, I get stop when I see the answer is something completely different that the answer posted in the back of the textbook.
weird
what are you getting?let formula be
you have
so plug in
Copy and paste to see my work and answer.
https://imgur.com/a/SARLc54
harpazo1965 wrote:https://i.imgur.com/HNPg3DX.jpeg
its a even-index root (4) so it needs a plus minus in front
Yes, every time we take the square root, the answer will be positive and negative.
harpazo1965 wrote:The current time is 12 noon CST. What time (CST) will it be 12,997 hours from now?
The question looks easy enough but it's tricky to me.
I know there are 24 hours in a day. So, I decided to divide 12,996 by 24 hours, which yield the decimal number 541.54166666667.
Of course, this decimal number tells me nothing.it tells how many days are included in 12996 hrs: 541 days
so 541*24 is how many whole days
subtract from 12996(did you divide 24 into 12997)
harpazo1965 wrote:A. How do I find the correct answer?
B. If the quotient found leads to the right answer, can you show me how?
however many hrs are left over after subtracting you add to 'noon' to get the time.
Let me see.
12,997 ÷ 24 = 541.54166666667
541 x 24 = 12,984
12,997 - 12,984 = 13
12 noon + 13 hours = 25 hours.
What time (CST) will it be 12,997 later?
I say 1am.
You say?
I came across an interesting question in Section R.5 for which Sullivan does not provide a sample question for.
Show that x^2 + x + 1 is prime.
harpazo1965 wrote:Copy and paste to see question and math work.
https://imgur.com/gallery/6mjyDcd
im on a laptop
i did right-click on image
'open image in new tab'
got url with file extension: https://i.imgur.com/t5wC8Hg.jpeg
wrapped in img tags
i think it workshttps://i.imgur.com/t5wC8Hg.jpeg
btw: put plus minus on square root
1. Thanks for your reply.
2. I don't have a laptop or computer.
3..Everything I do online is done on my android cell phone which is a few years old. Get it?
Look at the following fractions:
1/4 = 25/100
1/5 = 2/10
1/25 = 4/100If you choose a fraction which has only 2s and 5s as prime factors you can always re-write it with a denominator which is a power of ten.
eg. 40 = 2 x 2 x 2 x 5. 1/40 = 1/(2x2x2x5) = (5x5)/(2x5x2x5x2x5) = 25/1000
Fractions which have a denominator which is a power of ten will always result in a terminating decimal.
1/4 = 0.25
1/5 = 0.2
1/25 = 0.04
1/40 = 0.025No other prime factor can be manipulated in this way to give a terminating decimal so all other denominators result in recurring decimals.
eg.
1/3 = 0.3333333.....
1/7 = 0.142857142857......
1/11 = 0.090909.....If you have a recurring decimal it is always possible to turn it into a fraction.
eg.
0.16161616......
let a/b = 0.16161616.....
100a/b = 16.16161616.....
Subtract
99a/b = 16a/b = 16/99
eg.
0.7666666....
= 7/10 + 0.0666666
so use the above technique to get a/b for the recurring part and then sum the two fractions to get another rational.
So if all terminating and recurring fractions are rationals everything else must be irrational. So the irrationals are non-terminating, non-recurring decimals.
Bob
I totally get it. Thanks.
I do have one question.
You said subtract but there is no subtraction symbol in your work. I assume you made a typo. Yes? Also, can you answer my thread "Future Time". No one has replied. It's a rather short word problem but a bit tricky for me.
Subtract
99a/b = 16
a/b = 16/99
eg.
Looks good to me.
B
Another one for the book. I hope you don't mind having to copy amd paste my problems. I just can't figure out how to make the picture appear on the Message page. I tried several time bit to no avail.
That looks good to me.
B
Very good. It's amazing that I can do this stuff after more than 20 years since my college days ended.
If you graph this as a function you'll see it only crosses the x axis once so this will factorise into a linear factor and a quadratic one which won't further factorise in real numbers.
Maybe you're confused because you have used x to mean two different things. Let's avoid this by using y and b for the identity:
So y = 3x - 2 and b = 3. This will give you the linear factor and the quadratic cannot be simplified further.
Bob
There is no difference between the formula you provided and the textbook x^3 - a^3 = (x - a)(x^2 + ax + a^2). So, I don't understand your comment about me being confused. I didn't go further in my work.
Let x = (3x - 2)
Let a = 3
When I plug this into your formula and Sullivan's formula, I get stop when I see the answer is something completely different that the answer posted in the back of the textbook.
I used Wolfram Alpha https://www.wolframalpha.com/input?i=fa … 2+-+x+-+2+
and it has no easy factors. Are you sure you have it copied correctly?
Bob
Bob,
Yes, the question is exactly as stated in the book.
Here are the instructions:
Factor completely. If the polynomial cannot be factored, say it is prime.
This is question 119 in the textbook.
The textbook answer is (x - 1)(x + 1)(x + 2).
Links: Terminating decimal and Recurring decimal.
Thanks for the links. I will check it out.
Copy and paste to see question and math work.
https://imgur.com/gallery/6mjyDcd
Copy and paste to see question and math work.
https://imgur.com/gallery/e6ySIqm