Toán Lớp 7: Cho hàm số y=f(x)=5-2x.
Tính: f(-2); f(-1,5); f(0); f(-1/2) .
Gấppp
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Toán Lớp 7: Cho hàm số y=f(x)=5-2x.
Tính: f(-2); f(-1,5); f(0); f(-1/2) .
Gấppp
Comments ( 2 )
y = f\left( x \right) = 5 – 2x\\
+ f\left( { – 2} \right) = 5 – 2.\left( { – 2} \right) = 5 + 4 = 9\\
+ f\left( { – 1,5} \right) = 5 – 2.\left( { – 1,5} \right)\\
= 5 + 3\\
= 8\\
+ f\left( 0 \right) = 5 – 2.0 = 5\\
+ f\left( { – \dfrac{1}{2}} \right) = 5 – 2.\left( { – \dfrac{1}{2}} \right) = 6
\end{array}$