Question

If f (x) = x and g(x) = 3x + 1 are two real functions. Find (f + g) (x)

Answer 1

4x + 1

Explanation:

note that (f + g)(x) = f(x) + g(x) , thus

f(x) + g(x)

= x + 3x + 1 ← collect like terms

= 4x + 1