Question

Cho hàm số y = f(x) = 2x 2 + 5x – 3. Tính f(1); f(0); f(1,5).

Answer 1

\(y=f\left(x\right)=2x^2+5x-3\)

=>\(y=f\left(1\right)=2.1^2+5.1-3=4\)

\(y=f\left(x\right)=2x^2+5x-3\)

=>\(y=f\left(0\right)=2.0^2+5.0-3=-3\)

\(y=f\left(x\right)=2x^2+5x-3\)

=>\(y=f\left(5\right)=2.5^2+5.5-3=72\)

Answer 2

tăng lên 72%

Answer 3

Theo bài ra ta có : \(y=f\left(x\right)=2x^2+5x-3\)

+) Với \(f\left(1\right)=2.1^2+5.1-3=2+5-3=4\)

+) Với \(f\left(0\right)=2.0^2+5.0-3=-3\)

+) Với \(f\left(1,5\right)=2.1,5^2+5.1,5-3\)

Answer 4

\(f\left(1\right)=2\cdot1^2+5\cdot1-3=4\)

\(f\left(0\right)=2\cdot0^2+5\cdot0-3=-3\)

\(f\left(1,5\right)=2\cdot1,5^2+5\cdot1,5-3=9\)