Question

Need help please :( What is the second term of (s+v)^5?

Answer 1

First compute the coefficient like this:
$C_5^1=\frac{5!}{1!(5-1)!}=\frac{5!}{4!}=\frac{5\times4!}{4!}$
Simplifying the fraction over 4! we get:
$C_5^1=5$
and the variables are $s^4v$. So answer $5s^4v$.

The correct answer is C then.