Question

Cho hàm số : y = f(x) = \(-\dfrac{3}{2}\)x. Tính f(1), f(-1), f(2), f(-2), f(\(\dfrac{1}{2}\)), f(\(-\dfrac{1}{2}\)) và so sánh f(a) với f(-a)

Answer 1

\(f\left(1\right)=-\dfrac{3}{2}.1=-\dfrac{3}{2}\)

\(f\left(-1\right)=-\dfrac{3}{2}.\left(-1\right)=\dfrac{3}{2}\)

\(f\left(2\right)=-\dfrac{3}{2}.2=-3\)

\(f\left(-2\right)=-\dfrac{3}{2}.\left(-2\right)=3\)

\(f\left(\dfrac{1}{2}\right)=-\dfrac{3}{2}.\dfrac{1}{2}=\dfrac{-3}{4}\)

\(f\left(-\dfrac{1}{2}\right)=-\dfrac{3}{2}.\left(-\dfrac{1}{2}\right)=\dfrac{3}{4}\)

\(f\left(a\right)< f\left(-a\right)\)