Maths Books

iamaditya · 2017-03-08 23:40:50

And yeah, one thing I don't understand in this forum is that when you are sending the message, I am not receiving it, I have to refresh the page or go back to the previous page to again receive your message. Is this a similar problem happening with you all. If yes then how can I resolve it because then we will constantly have to go back and see whether you have sent a message or not for 2 persons marked "online" chatting in this forum.

bobbym · 2017-03-08 23:43:03

I have to press "New" to see a new post or I use refresh too. This is not a chat.

iamaditya · 2017-03-09 22:16:56

bobbym wrote:

I have to press "New" to see a new post or I use refresh too. This is not a chat.

Ok

Here are rest of the "difficult" questions from chapter surds:

Last edited by iamaditya (2017-03-10 21:16:53)

bobbym · 2017-03-10 17:30:36

Are these 3 separate questions?

iamaditya · 2017-03-10 21:16:19

Yes they are 3 different questions. And please not that i had given the last question wrong. I have edited it. Please see.

And yeah you have to simplify the following.

Last edited by iamaditya (2017-03-10 21:31:08)

iamaditya · 2017-03-14 22:29:01

Hi;

Have you seen the post? Long time no reply. Are you not able to solve these problems... If you want I may tell you the solutions... I am waiting for your reply and then will send you the difficult problems of other questions also... If you want I may send you the problems of other questions also. Please reply.

bobbym · 2017-03-15 02:52:31

Hi;

Do I use this expression

for all the questions?

iamaditya · 2017-03-15 22:20:15

No; only in the 1st question; for the rest questions you have to simplify them, understood.

Your 1 st answer is correct but you need to simplify the fraction.

Last edited by iamaditya (2017-03-16 01:49:47)

bobbym · 2017-03-16 04:20:05

Hmmm, that is strange because we always normalize the denominator else you will get

iamaditya · 2017-03-16 20:29:11

Hi;
your 1st answer is now correct. Yes you told right that we always rationalize the denominator... but still 1/√5 is more simpler... we rationalize the denominator when we have a fraction whose numerator or denominator is composed of more than 1 term. Example

will be written as . But I think that 1/√5 is more simpler than √5/5.

Your 2nd answer(answer of the 4th question) is wrong. Take x as 1 and then see it would not be matching.

Last edited by iamaditya (2017-03-16 20:29:56)

bobbym · 2017-03-17 14:26:37

Hi;

Are we talking about this one?

iamaditya · 2017-03-18 01:42:29

Yes

bobbym · 2017-03-18 06:07:18

Then what do you mean by a real solution of y and z. Because the

is a root and I believe the only real root.

iamaditya · 2017-03-19 22:49:01

Where did you get x as 1.609608190...??

bobbym · 2017-03-19 22:54:49

This equation has a real root:

which is just a basic manipulation of your problem. x can be found by numerical computation to as many digits as we need. But there is no closed form for x in terms of known constants that I can discover. But there are simple forms for y and z as I have posted.

iamaditya · 2017-03-19 23:04:16

Hmm, yours solution is right but actually I a
Had found a different solution. It is

Thus we can take y as 2 and z as 1

bobbym · 2017-03-19 23:11:50

Is that the answer the book gave?

iamaditya · 2017-03-19 23:51:18

No, I found it out myself. Why is it wrong?

bobbym · 2017-03-20 07:10:49

Hi;

I do not think it is wrong, I think I did not understand the question and solved another problem.

Your answer leads to this:

Is that what they wanted?

iamaditya · 2017-03-26 18:57:54

Yes, I think.

bobbym · 2017-03-26 19:24:23

Hi;

What does the book think of this one?

iamaditya · 2017-04-02 21:53:18

Hmm, the thing is that I too forgot the soln. I once solved it very easily but I don't know why I am not being able to do that now. Ok don't worry I will post you the solution after I am able to do it once again.

Anyways, today I was doing some problems on logarithms and my gosh........!!!! SOOOOOOOOO...DIFFICULT problems. I finally started crying..but i still managed to score 10 out of 20.

bobbym · 2017-04-03 04:48:25

I forget solutions too after a day or two. You should get into the habit of keeping notes.

gAr has this as a signature.

The palest ink is better than the strongest memory.

iamaditya · 2017-04-03 20:46:15

I forget solutions too after a day or two. You should get into the habit of keeping notes.

Yes, you are right.

gar has this signature.
The palest ink is better than the strongest memory.

But when I visited his profile his signature showed this:

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

bobbym · 2017-04-03 20:50:21

That was his signature before he changed to those.

Math Is Fun Forum

#76 2017-03-08 23:40:50

Re: Maths Books

#77 2017-03-08 23:43:03

Re: Maths Books

#78 2017-03-09 22:16:56

Re: Maths Books

#79 2017-03-10 17:30:36

Re: Maths Books

#80 2017-03-10 21:16:19

Re: Maths Books

#81 2017-03-14 22:29:01

Re: Maths Books

#82 2017-03-15 02:52:31

Re: Maths Books

#83 2017-03-15 22:20:15

Re: Maths Books

#84 2017-03-16 04:20:05

Re: Maths Books

#85 2017-03-16 20:29:11

Re: Maths Books

#86 2017-03-17 14:26:37

Re: Maths Books

#87 2017-03-18 01:42:29

Re: Maths Books

#88 2017-03-18 06:07:18

Re: Maths Books

#89 2017-03-19 22:49:01

Re: Maths Books

#90 2017-03-19 22:54:49

Re: Maths Books

#91 2017-03-19 23:04:16

Re: Maths Books

#92 2017-03-19 23:11:50

Re: Maths Books

#93 2017-03-19 23:51:18

Re: Maths Books

#94 2017-03-20 07:10:49

Re: Maths Books

#95 2017-03-26 18:57:54

Re: Maths Books

#96 2017-03-26 19:24:23

Re: Maths Books

#97 2017-04-02 21:53:18

Re: Maths Books

#98 2017-04-03 04:48:25

Re: Maths Books

#99 2017-04-03 20:46:15

Re: Maths Books

#100 2017-04-03 20:50:21

Re: Maths Books

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