Toán Lớp 7: Cho hàm số y = 3x – 2 . giá trị f(2)
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Toán Lớp 7: Cho hàm số y = 3x – 2 . giá trị f(2)
Comments ( 2 )
Nếu f (2 ) thì ta có : y = 3×2 – 2
=> y = 6 – 2
=> y = 4
Vậy nếu f(2) thì y = 4
y = f(x) = 3x – 2
<=> f(2) = 3. 2 – 2
<=> f(2) = 6 – 2
<=> f(2) = 4
$Vậy$ f(2) = 4