11/29/19

How to solve this equation?
(2x+5)^(x+1)=729x+1=ln(729)/ln(2x+5)What do I do from here? All I know is that the answer is x=2. Please show all your work. Thanks.
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11/18/19

How to solve this equation?
2^x+3^x=13I know that the answer is x=2 but I don't know how to work this problem out. Can someone please help me?
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10/31/19

Find the interval of convergence?
Find the interval of convergence for ∑ (x^n)/(2^n) from n=0 to infinity. The answer is (-2, 2). Please show all your work. Thank you.
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10/31/19

Help me with this integral problem?
Show whether ∫ 1/x^4 dx from -1 to 2 is convergent or divergent. If convergent, evaluate the integral. Here's my work:After integrating, I got [-1/(3x^3)] from -1 to 2 and I got -3/8 as the answer... more
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10/23/19

How to solve this integral?
∫ (x+1)/(x^2+5x+6) dxPlease show all your work and tell me the right answer. Thanks.
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10/02/19

Find the integral?
Evaluate the integral 7/(w^2+3w+3) dw.Here's my work:I've completed the square and came up with this:∫ 7/[(w+3/2)^2+3/4] dw----------------------------------where u=w+3/2 and du=dw.So ∫ 7/(u^2+3/4)... more
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01/25/15

Find the maximum height?
A stone weighing 1/2 lb is thrown upward from an initial height of 5 ft with an initial speed of 32 ft/s. Air resistance is proportional to speed, with k=1/128 lb-s/ft. Find the maximum height... more
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09/06/14

Solve y'=(-6x+y-3)/(2x-y-1) implicitly.
Solve y'=(-6x+y-3)/(2x-y-1) implicitly.    Answer: (y+2x+1)^(4)(2y-6x-3)=C   The 4 in the answer is the exponent. Please show all your work step by step and tell me the right answer. 
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08/07/14

Find the general solution?
Find the general solution of y'+(2x/(1+x^2))y=e^(-x)/(1+x^2).   Answer: y=-(e^(-x)+C)/(1+x^2)   Please show all your work step by step.
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08/07/14

Find the general solution?
Find the general solution of y'+2xy=xe^(-x^2).   Answer: y=e^(-x^2)(x^2/2+C)   Please show all your work step by step.
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08/07/14

Find the general solution?
Find the general solution of y'+(1/x-1)y=-2/x.   Answer: y=2/x+(c/x)e^x   Please show all your work step by step.
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08/05/14

Find the general solution?
Find the general solution of xy'+(ln x)y=0.   Answer: y=ce^(-(ln x)^2)/2   Please show all your work step by step. And tell me the input on Ti-89 for this problem to find the answer. 
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08/04/14

Solve the initial-value problem?
Solve the initial-value problem y'''=(x^2)(e^x), y(0)=1, y'(0)=-2, y"(0)=3.    Answer: y=(x^2-6x+12)e^x+x^2/2-8x-11   Please show all your work step by step. Thanks.
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07/29/14

Solve the differential equation?
Solve the differential equation y"+y'=e^t.    Please show all your work step by step and tell me the right answer. Also tell me how to find the answer for this problem on Ti-89 calculator. Also... more
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07/28/14

Solve the differential equation?
Solve the differential equation y"+y'=e^t.   Please show all your work step by step and tell me the right answer.
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07/20/14

Use exact arithmetic?
Use exact arithmetic to solve the following system:   10-3x-y=1, x+y=0.   The book says the answer is (1/1.001, -1/1.001). Please show all your work step by step. Thanks.
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07/20/14

Use 3-digit arithmetic with partial pivoting?
Use 3-digit arithmetic with partial pivoting to solve the following system:   10-3x-y=1, x+y=0.   The book says the answer is (1, -1). Please show all your work step by step. Thanks.
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07/20/14

Use 3-digit arithmetic with no pivoting?
Use 3-digit arithmetic with no pivoting to solve the following system:   10-3x-y=1, x+y=0.   The book says the answer is (0, -1). Please show all your work step by step. Thanks.
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07/16/14

Use Gaussian elimination with back substitution?
Use Gaussian elimination with back substitution to solve the following system:   x1+x2+x3=1, x1+2x2+2x3=1, x1+2x2+3x3=1.   The answer is (1, 0, 0) but I don't know how to get there. Please... more
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07/15/14

Can anyone please recommend me a good textbook for Linear Algebra?
Can anyone please recommend me a good textbook for Linear Algebra that has lots of practice problems and less theoretical problems? 
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07/15/14

Can you recommend me a good textbook for this course?
Can you please recommend me a good textbook for the course "Complex Variables with Applications"? 
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07/14/14

Is this course taken after Differential Equations?
Is the course "Complex Variables with Applications" the course taken after Differential Equations? What does this course cover? Is this course applied or pure math? Can someone recommend me a good... more
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07/12/14

What's "Advanced Math for Engineers"?
Is "Advanced Math for Engineers" a course taken after Differential Equations for engineering students at college? What does this course cover? Is it useful for computer programmers? Can someone... more
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07/01/14

Write a python program?
Write a python program that finds the value of pi to 20 decimal places.    Please provide me the shortest code as possible. Thanks.
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06/29/14

How do I write this python program?
Write a python program to find the 1000th prime number.    Here's what I wrote: def nthprime(n):      print nthprime(1000)   and when I run it, I got nothing. What's wrong with my code?... more
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