---->>> (n even number)
=0 --------------------------------------------------------->>>>(n odd number)
i use binomial expansion theorem but i cannot get the answer like this.....please give me hint for these problems>>>><<<<
Your notation is not at all standard. I will help you rewrite it. Press Reply With Quote to see how I did it.
For the first one,
For the coefficient of , you have on the LHS. On the RHS, you need to multiply out first. Each term will be of the following form: . So, you want to add up all terms where . That means . So,
Since for all , you can rewrite the RHS as: