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the question is in the picture

I cant figure out these problems. I keep getting stuck and finding the wrong answer. Show that: x = (summation sign)_n=1 to (infinity) of ((2/n)(-1)^(n+1)*sin(nx) a similar one i mess up the

I don’t know how to solve the problem in the attached files, please help me, thanks a lot.

Please help answer question regarding diffferntial equation in a timely manner. Willing to netogiate.

I need help understanding how to solve numbers 1 and 4. Thanks!

Hi, I found you on Chegg and again on here with your help on others. You seem very knowledgeable, I was wondering if you can help me with this project. I have attached the description and the two

As a spring is heated, its spring constant decreases (see the figure). Suppose the spring is heated to that the spring constant at time t is given by k(t)=6-t (N/m). If the unforced mass-spr

y””‘ 2y”” 2y”‘+4y” +y’ 2y = 8t^3.

In each of problem 1 through 2, (a) find the indicial equation, (b) determine the appropriate form of two linearly independent solutions, and (c) find the first five terms of each of two linearly ind