Question

A = 2 LA N+1 · 5LA N +1

Answer 1

a=2 la n+1  ·5 la n+1
a=[2·5] la [n+1]²
a=10 la [n+1]²⇒a-este patrat perfect;

Answer 2

A= $2^{N+1} x5^{N+1}$
A= $10^{(N+1)x2}$
A= $10^{2N+2}$