Question

Cho hàm số y=f(x)=2x–3 tính f1,f–2,f–3

Answer 1

f(1)=2-3=-1

f(-2)=-4-3=-7

f(-3)=-6-3=-9

Answer 2

\(f\left(1\right)=2.1-3=2-3=\left(-1\right)\)
\(f\left(-2\right)=2.\left(-2\right)-3=\left(-4\right)-3=\left(-7\right)\)
\(f\left(-3\right)=2.\left(-3\right)-3=\left(-6\right)-3=\left(-9\right)\)

Answer 3

f(1)=2 . 1 -3=2-3=-1

f(-2)=2 .(-2)-3=(-4)-3=-7

f(-3)=2.(-3)-3=(-6)-3=-9

Answer 4

f(1)=2 . 1 -3=2-3=-1 f(-2)=2 .(-2)-3=(-4)-3=-7 f(-3)=2.(-3)-3=(-6)-3=-9