Search 75,696 tutors
FIND TUTORS
Ask a question
0 0

Given that f(x)=6x+5 find the value of f(a)+f(2a)

Tutors, please sign in to answer this question.

1 Answer

f(x) = 6x+5
 
The notation f(a) is short for f(x=a).  Similarly, f(2a) is f(x=2a).  So just replace the x in the function with a or 2a:
f(x) = 6x + 5
 
f(a) = 6a + 5
 
f(2a) = 6(2a) + 5 = 12a + 5
 
So:
 
f(a) + f(2a) = 6a + 5 + 12a + 5
 
Combine like terms to get the answer.

Comments

Comment