Question

Dada a função f(x)=2(x)²-3x -1/2 : A) 2 f(-1) - 3/2 f(2/3)

Answer 1

f(-1) = 2.1 + 3 - 1/2 = 5 - 1/2 = 9/2

f(2/3) = 2(2/3) -3(2/3) - 1/2 = 4/3 - 2 - 1/2
= 8/6 - 12/6 - 3/6 = -4/6 - 3/6 = -7/6

a) 2f(-1) - 3/2f(2/3)

2.(9/2) - 3/2(-7/6) = 9 + 7/4 = 43/4