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#1 Re: Help Me ! » Differentiation help needed! » 2012-04-18 23:03:58
Ah! I get it now. Thanks, I didn't realize that (2+h,(2+h)^2+5(2+h)) was a coordinate.
#2 Help Me ! » Differentiation help needed! » 2012-04-18 02:31:51
- Marisca
- Replies: 4
Hi, I'm having trouble with this question.
For a curve with equation y=x^2+5x
a) find the gradient of the chord PQ where P is the point (2.14) and Q is the point (2+h,(2+h)^2+5(2+h)).
#3 Re: Help Me ! » Linear literal equations » 2012-04-09 01:39:40
Ok, thank you 
#4 Re: Help Me ! » Linear literal equations » 2012-04-06 21:51:01
hi bobbym, the question was asking for a parameter.
Thanks, that really helped
#5 Re: Help Me ! » Linear literal equations » 2012-04-04 15:52:54
Ok, I have another question.
x-y = 6 and 2x-2y=12 have infinitely many solutions. Describe these solutions through the use of a parameter.
All I've been able to do so far is set up the matrices, but I don't know where to go from there.
#6 Re: Help Me ! » Linear literal equations » 2012-04-04 13:34:05
Ok, thanks!
#7 Re: Help Me ! » Linear literal equations » 2012-04-04 13:04:50
ok, so I'm not sure if this is right, but I got
x=-ab/(b-1)
also, why did you multiply by x(x+1)?
#8 Help Me ! » Linear literal equations » 2012-04-04 12:40:22
- Marisca
- Replies: 12
Hi, I'm having trouble solving for x with this question
1/(x+a) = b/x
#9 Re: Help Me ! » Help needed! » 2012-03-31 11:35:26
ah, thanks everyone!!
I definitely understand it now.
#10 Help Me ! » Help needed! » 2012-03-30 22:50:12
- Marisca
- Replies: 9
Hi, I can't seem to solve this problem;
Factor f(x)=6x^3+5x^2-17x-6 completely.
#11 Re: Help Me ! » Exponential help needed! » 2012-03-26 00:31:12
Thank you! I understand it now.
#12 Re: Help Me ! » Exponential help needed! » 2012-03-25 01:56:53
So something like y=0?
Also, would I need to sub f(x)=2^x into y=f(x+1)?
#13 Help Me ! » Exponential help needed! » 2012-03-25 00:27:05
- Marisca
- Replies: 5
Hi, I have a question that I don't really understand.
For f(x)=2^x, sketch the graph of the following, labeling asymptotes where appropriate:
a) y=f(x+1)
#14 Re: Help Me ! » Families of functions help needed! » 2012-03-12 03:35:56
Yes, I could finish it from there.
Thanks a lot, really helped me
#15 Help Me ! » Families of functions help needed! » 2012-03-10 14:20:11
- Marisca
- Replies: 3
Find {x:x^3/2 > x^2}
I Have no idea how to do this, please help!
#16 Re: Help Me ! » Unique, infinite and no solutions... » 2012-01-14 02:21:05
Thanks.
#17 Re: Help Me ! » Unique, infinite and no solutions... » 2012-01-14 02:09:39
Thanks, but I don't understand how you arrived at those answers.
#18 Help Me ! » Unique, infinite and no solutions... » 2012-01-14 01:38:09
- Marisca
- Replies: 7
Hi, could anyone help me with this problem?
Find the values of b and c, or the relationship between b and c, for which the equations
x+5y=4 and 2x+by=c have:
I) a unique solution,
II) an infinite set of equations,
III) no solution.
#19 Re: Help Me ! » Implied Domain » 2012-01-10 18:30:22
Alright, thanks a lot
Oh, and that video is really helpful too!
#20 Help Me ! » Implied Domain » 2012-01-10 12:57:49
- Marisca
- Replies: 4
Hi again, I'm stuck on this equation,
I'm really not sure how I'm supposed to approach it.
#21 Re: Help Me ! » Need help with expanding... » 2012-01-09 20:52:38
Thank you!
#22 Help Me ! » Need help with expanding... » 2012-01-09 18:25:38
- Marisca
- Replies: 3
Hi,
For f(x)=3x^2+x-2 find: {x:f(x)>0}
for this question I expanded and got;
(3x-2)(x+1)>0, and from that x>2/3 and x>-1, which turns out as incorrect.
Could someone tell me where I went wrong?
#23 Re: Help Me ! » Linear functions and Matrices » 2011-10-07 00:16:50
Yes I think so. It's probably not likely that they're going to sneak it into my exam.
Thanks for your help.
#24 Re: Help Me ! » Linear functions and Matrices » 2011-10-07 00:09:35
Thanks for the tip
#25 Re: Help Me ! » Linear functions and Matrices » 2011-10-07 00:04:11
Z=1/(a-3)