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by nona.m.nona
Tue Sep 27, 2016 2:50 pm
Forum: Beginning Algebra
Topic: Solving Multi Step Equations
Replies: 1
Views: 16

Re: Solving Multi Step Equations

Hi everyone, we are needing help on [solving] a multi-step equation. \mbox{Solve }\, -x\, -\, 2\,=\, 3x\, +\, 5 In this [worked solution]: -x - 2 = 3x + 5 -1x - 2 = 3x + 5 -3x -3x ---------------- -4x - 2 = 0x + 5 <=== -4x - 2 = 5 -4x - 2 = 5 + 2 = +2 ------------ -4x + 0 = 7 -4x = 7 -4x = 7 --- --...
by nona.m.nona
Tue Sep 27, 2016 2:44 pm
Forum: Geometry
Topic: Two parallel lines cut by a curved line
Replies: 3
Views: 17

Re: Two parallel lines cut by a curved line

How do you find x? It's not 38. Could it be 37? What is the use of the 75 angle? Lacking information regarding "x", "38", "37", "the 75 [degree?] angle", or any other information regarding this exercise, I'm afraid there is no way to proceed. Kindly please en...
by nona.m.nona
Thu Jul 14, 2016 6:43 pm
Forum: Intermediate Algebra
Topic: Sorry my ignorance but please help me to understand why x/sqr(x)
Replies: 2
Views: 574

Re: Sorry my ignorance but please help me to understand why x/sqr(x)

...he states that x/sqr(x) is equal to sqrt(x) which i obviously believe i typed x/sqrt(x) in wolfram alpha and it also gave me the result sqrt(x) but i don't understand why What did you get when you did the simplification? You noted that: \sqrt{ x^2\,}\, =\, x (for non-negative x) so: x\, =\, \lef...
by nona.m.nona
Thu Jul 14, 2016 6:34 pm
Forum: Beginning Algebra
Topic: Order of operations isn't working.
Replies: 3
Views: 405

Re: Order of operations isn't working.

I don't understand math; that's why I'm here. I thought that I was doing pemdas exactly...addition comes before subtraction. It seems to me that I'm doing exactly what they gave me. No. As explained in ( this ) lesson, addition and subtraction are at the same "level" and are done at the s...
by nona.m.nona
Sun May 15, 2016 12:29 pm
Forum: Calculus
Topic: How to prove the following function is increasing function?
Replies: 5
Views: 590

Re: How to prove the following function is increasing function?

Note to other viewers: This user has posted similar questions here, and has "voluntarily" removed them from here.
by nona.m.nona
Sun May 15, 2016 12:27 pm
Forum: Calculus
Topic: How to prove the following function is increasing function?
Replies: 5
Views: 590

Re: How to prove the following function is increasing function?

I am stuck on figuring out why the following function is a increasing function when I read a paper. The function is following f(x)\, =\, \dfrac{(x\, -\, 1)\, c^x\, -\, 2x\, c^{x-1}\,+\,x\,+\,1}{2^x\,-\,x\,-\,1}, \, \mbox{ with }\, 1\, <\, c\, <\, 2\, \mbox{ and }\, x\, >\, 2. This a...
by nona.m.nona
Sat May 07, 2016 1:22 pm
Forum: Matrix (Linear) Algebra
Topic: find rotation matrix in n dimention
Replies: 2
Views: 704

Re: find rotation matrix in n dimention

A fairly complete reply is posted here.
by nona.m.nona
Thu Jan 28, 2016 10:04 pm
Forum: Matrix (Linear) Algebra
Topic: matrix notation
Replies: 1
Views: 581

Re: matrix notation

Apologies, but I'm drawing a blank. Kindly please provide the exact text (or scan) of the "something" which generated your query. Thank you.
by nona.m.nona
Wed Jan 06, 2016 9:39 pm
Forum: Calculus
Topic: One more question: line tangent to y=2 sin(2 x+(3pi/4)) at x=pi/8
Replies: 4
Views: 1177

Re: One more question: line tangent to y=2 sin(2 x+(3pi/4)) at x=pi/8

bookwrm98 wrote:So pull out the 2, then do the derivative of sin(f(x)), and the final derivative equals 4cos(2x+(3pi/4)), then just find the line from there. Is that right?

You are correct.

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