Question

a) Cho hàm số y=f(x)=-2x+3.Tính f(-2);f(-1);f(0);f(-1/2);f(1/2)

b) Cho hàm số y=g(x)=x^2-1.Tính g(-1);g(0);g(1);g(2)

Answer 1

a/ y=f(x)=-2x+3

f(-2)=-2*(-2)+3=7

f(-1)=-2*(-1)+3=5

f(0)=-2*0+3=3

f(-1/2)=-2*-1/2+3=4

f(1/2)=-2*1/2+3=2

b/y=g(x)=x^2-1

g(-1)=-1^2-1=-2

g(0)=0^2-1=-1

g(2)=2^2-1=3

Answer 2

a) f(-2)=+2.(-2)+3=7

f(-1)=2.(-1)+3=5

f(0)=2.0+3=3

f(-1/2)=2.(-1/2)+3=4

f(1/2)=2.1/2+3=2

b) g(-1)=-1^2-1=-2

g(0)=0^2-1=1

g(1)=1^2-1=0

g(2)=2^2-1=3

CHÚC BẠN HC TỐT!!