Question

cho hàm số y=f(x) = x2 -2 tính f (2), f(1), f(0), f(-1) , f(7)

Answer 1

f(x) = x² - 2

f(2) = 2² - 2 = 4 - 2 = 2

f(1) = 1² - 2 = 1 - 2 = - 1

f(0) = 0² - 2 = 0 - 2 = - 2

f(- 1) = (- 1)² - 2 = 1 - 2 = - 1

f(7) = 7² - 2 = 49 - 2 = 47

Answer 2

ta có: f(2)=2.2-2=2

f(1)=1.2-2=0

f(0)=0.2-2=-2

f(-1)=-1.2-2=-4

f(7)=7.2-2=12