Use the definitions of expectation and variance.
Integrate by parts,
with
Then
(since the integral of the PDF is 1, and this integral is 4 times that)
Compute the so-called second moment.
Integrate by parts, with
Then
and the variance is
Answer: this is how you do it
Step-by-step explanation:
For example if you have a function f(x) = x - 1, then x = 1 is a zero of this function because using it as x gives 1 - 1 = 0. The Riemann Zeta function has some zeros that are easy to find which are of little interest but there are some other ones that are harder to find which is why the are called non-trivial.
Answer:
C)between 8.4 and 8.5
Step-by-step explanation: