f(x) = 2x + 3 means the function named f multiplies the input by 2 then adds 3.
f: x → 2x + 3 is the same rule.
Replace x with the given value.
Example: If f(x) = x2 - 4x + 1, find f(3).
f(3) = 32 - 4(3) + 1 = 9 - 12 + 1 = -2
Example: If g(x) = 5/x, find g(-2).
g(-2) = 5/(-2) = -2.5
How was the lesson? Discuss Lesson
Given f(x) = 3x - 2, g(x) = x2 + 1, h(x) = 4/x, find:f(4)g(-3)h(2)f(-1)g(0)h(-4)
View Exercise Submit Exercise