Question

Given f (x) = 3x+4, find f (2)

Answer 1

f(x) = 4x + 4 means that if we put an x into our function, a 3x + 4 come out.

So in this problem, we're putting a 2 into our function which

means that a 3(2) + 1 comes out which simplifies to 6 + 1 or 7.

So f(2) = 7 or the value of the function at 2 equals 7.

Answer 2

Explanation

• Given the equation.

$f(x) = 3x + 4$

• Find f(2) by substituting x = 2 in the equation.

$f(2) = 3(2) + 4 \\ f(2) = 6 + 4 \\ f(2) = 10$

Therefore the value of f(2) is 10.

• Meaning of f(a) and substitution in function

f(a) means the value of f(x) is ... at x = a. Same goes to the f(2) = 10. It means the value of f(x) = 10 at x = 2.

Answer

$f(2) = 10$