Question

Determine: f (f (2)), f (x) = x2 + 2 x - 1

Answer 1

primeiro, determine f(2):
f(2)=(2)² +2*(2) -1 = 4 + 4 - 1 = 7

agora, f(f(2)):
como f(2) = 7 =>
f(7) = (7)² + 2*(7) - 1 = 49 + 14 - 1 = 62

Poranto (f(f2)) = 62

Answer 2

Determine: f (f (2)), f (x) = x2 + 2 x - 1


f (2) = 2^2 + 2(2) - 1 = 4+4-1 = 7

f (f(7)) = 7^2 + 2(7) - 1 = 49+14-1 = 62