​f(x)=4*6^x and ​g(x)=3•6^x ​+ 9​

Question

( f-g)(x)

(f-g)(3)

Answer 1

With this kind of a problem you need to be careful about what you mean -- although the rules of order of operations are usually pretty clear.

 

f(x) = 4(6^x) and g(x) = 3(6^x) + 9

 

f(x) - g(x) = 6^x(4-3) - 9 = 6^x - 9

 

f(3) - g(3) = 216 - 9 = 217