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by FWT
Thu May 12, 2016 5:31 pm
Forum: Calculus
Topic: How would you solve x^2*e^x/x^2+e^x ? (* symbolizing multipication)
Replies: 1
Views: 13

Re: How would you solve x^2*e^x/x^2+e^x ? (* symbolizing multipication)

I got the answer x*e^x(x+2e^x)/2x+e^x , but the answer my textbook gives is x*e^x(x^3+2e^x)/(x^2+e^x)^2. I don't understand why there is an x^3 in the parenthesis nor why the bottom section is squared. What do you mean by "solving" the expression? (Only equations can be solved. Expression...
by FWT
Thu May 12, 2016 5:28 pm
Forum: Beginning Algebra
Topic: linear equations
Replies: 1
Views: 56

Re: linear equations

Good morning, I am having trouble grasping the concept of how to setup linear equations. I could really use some help with the following problem: At a football game, dad purchases hot dogs for $1.25 and drinks for $1.75. If he purchases 9 items for $13.25, how many of each did he purchase? This is ...
by FWT
Fri Apr 08, 2016 1:25 pm
Forum: Calculus
Topic: Optimization problem is giving me ALOT of trouble.
Replies: 1
Views: 307

Re: Optimization problem is giving me ALOT of trouble.

2. A shed will have square ends and a sloped roof. Did they maybe have a picture with this? Because if two sides are square, then they can't have a sloped roof over them. The sides would have to have triangles of some kind above any squares. When you write back, please show what you did so far, lik...
by FWT
Sat Apr 02, 2016 12:07 am
Forum: Advanced Algebra ("pre-calculus")
Topic: solving for x given: 4e^-.2x + 3e^-.3x = 5
Replies: 4
Views: 113

Re: solving for x given: 4e^-.2x + 3e^-.3x = 5

b-thanks and the 5 should be .5 So you meant this: \mbox{Solve }\, 4e^{-0.2x}\, +\, 3e^{-0.3x}\, =\, 0.5 Try using the steps, etc, explained in your other thread . The equations are pretty much the same so the methods will be pretty much the same too. If you get stuck, please write back showing wha...
by FWT
Sat Apr 02, 2016 12:05 am
Forum: Advanced Algebra ("pre-calculus")
Topic: solving for x, given exponentials: 4e^2x + 5e^3x = 15
Replies: 7
Views: 361

Re: solving for x, given exponentials: 4e^2x + 5e^3x = 15

I meant b So you meant this: \mbox{Solve }\, 4e^{2x}\, +\, 5e^{3x}\, =\, 15\, \mbox{ for the value of }\, x. and in order to solve say e^(2x) = Y I would take log of both sides so- Taking logs of both sides would give you this: \ln\left(\,4e^{2x}\, +\, 5e^{3x}\,\right) =\, \ln(15) Y...
by FWT
Fri Mar 18, 2016 3:15 pm
Forum: Calculus
Topic: u substitutions
Replies: 3
Views: 251

Re: u substitutions

wiloben25 wrote:i understand that u=t^2 gives rise to du = 2t dt however i can't wrap my head around how this integrates into the orginal through substituition.

Use the next step that I gave you. The numerator is t^5 dt = (t^2 t^2 t) dt = (t^2)^2 (t dt) = ... and so forth.
by FWT
Fri Mar 18, 2016 3:14 pm
Forum: Arithmetic
Topic: Calculating An Equation
Replies: 1
Views: 134

Re: Calculating An Equation

For homework, I have been given four points and I want to figure out the equation for them. The points are: (1,4) (2,8) (3,16) (4,32) The point is that the equation doesn't match all of the given points. What is your equation? How did you get it? Please reply as soon as possible by this evening. Li...
by FWT
Thu Mar 17, 2016 3:47 pm
Forum: Calculus
Topic: u substitutions
Replies: 3
Views: 251

Re: u substitutions

wiloben25 wrote:stuck on this
use a substitution u=t^2 to solve the integration t^5/sqrt(3-t^4)

They gave you u = t^2, so you know du = 2t dt and u^2 = t^4. Plugging in with this gives t^5 dt = u^2 du, etc. Where are you stuck? Please show all of your work so far. Thanks.
by FWT
Thu Mar 17, 2016 3:45 pm
Forum: Arithmetic
Topic: What is inverse property of addition?
Replies: 3
Views: 371

Re: What is inverse property of addition?

Smrithi wrote:What is inverse property of addition?

Pls explain with few examples

There's loads of examples online. Where are you stuck with this?
by FWT
Wed Mar 09, 2016 10:21 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: HELP! Write Polynomial in completely factored form
Replies: 1
Views: 312

Re: HELP! Write Polynomial in completely factored form

For each of the following complex polynomials, one of its zeroes is given. Use this zero to help write the polynomial in completely factored form. a. C(z) = z^3+(1-4i)z^2+(-6-4i)z+24i ; z=4i answer - C(z) = (z-4i)(z+3)(z-2) Gotta love having the answer, but no clue how to solve. They give you the o...

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