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by FWT
Fri Apr 08, 2016 1:25 pm
Forum: Calculus
Topic: Optimization problem is giving me ALOT of trouble.
Replies: 1
Views: 104

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: 81

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: 230

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: 204

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: 95

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: 204

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: 301

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: 280

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...
by FWT
Sun Feb 28, 2016 7:42 pm
Forum: Matrix (Linear) Algebra
Topic: Matrix inverse identity
Replies: 2
Views: 613

Re: Matrix inverse identity

Doesn't "inverse" only apply to square (n=m) matrices?
by FWT
Sat Feb 20, 2016 11:22 am
Forum: Advanced Algebra ("pre-calculus")
Topic: Simplifying Logarithms
Replies: 1
Views: 478

Re: Simplifying Logarithms

Rewrite the given logarithm so that all products and exponents are eliminated. ln(4x^2) Here's the answer: ln 4+2 ln x I don't have a very good grasp on the logarithm properties, could someone explain how this answer was derived? They explain it all here . In this example, 1st you'd split the multi...

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