Question

级数，请问这个是收敛还是发散，过程谢谢

Answer 1

(√2)^(2n+1)

=√2.2^n
∑(n:0->无穷) (-1)^n . 3(√2)^(2n+1) / 2^(n+1)
=∑(n:0->无穷) (-1)^n . 3√2.2^n / 2^(n+1)
=∑(n:0->无穷) (-1)^n . (3√2/2)
=(3√2/2) ∑(n:0->无穷) (-1)^n
发散