Question

dada a função R-R por f(x)=X²+2x, determinar o valor de f(2)+f(3)+f(1).

Answer 1

f(x)=X²+2x

f(2)= 2² +2.2

f(2)= 4+4 = 8

f(3)=X²+2x

f(3)= 3² +2.3

f(3)= 9+6=15

f(1)=X²+2x

f(1)= 1²+2.1

f(1)=1+2= 3

f(2)+f(3)+f(1)

8+15+3 = 26