Question

  ai giúp vs ạ

Answer 1

Bài 1:

\(f\left(\dfrac{1}{2}\right)=4\cdot\left(\dfrac{1}{2}\right)^2-7=4\cdot\dfrac{1}{4}-7=1-7=-6\)

\(f\left(3\right)=4\cdot3^2-7=4\cdot9-7=36-7=29\)

Bài 2:

\(g\left(-1\right)=\left(-1\right)^3-13\cdot\left(-1\right)+9=1+13+9=23\)

\(g\left(-2\right)=\left(-2\right)^3-13\cdot\left(-2\right)+9=-8+9+26=27\)

\(g\left(0\right)=0^3-13\cdot0+9=9\)

\(g\left(1\right)=1^3-13\cdot1+9=1-13+9=-3\)

\(g\left(2\right)=2^3-13\cdot2+9=8+9-26=17-26=-9\)