Question

Jika f(x) = 2x² - 5.tentukan range fungsi untuk :
a. f(1)
b. f(3) + f(1)
c. f(-2) - f(0)
d. 3f(2) - f(1)

Answer 1

F(x)= 2x^-5

a. f(1)= 2(1)^-5
=2-5
=-3
b. f(3)+f(1)= 2. 3^-5 + 2.1^-5
=18-5 +2-5
=13+(-3)
= 10
c. 3f(2)-f(1)= 3. 2.2^-5 - 2.1^-5
=24-5-(-3)
=19-(-3)
=22