If f(x)= x2-3x and g(x)=f(3x), what is g(-10)?
Solution
Correct Answer: Option D
f(x)= x2-3x
∴f(x)= (3x)2 -3.3x= 9x2-9x
f(3x)= 9x2-9x
∴g(-10)= 9(-10)2 -9.(-10)
=900+90
= 990
∴f(x)= (3x)2 -3.3x= 9x2-9x
f(3x)= 9x2-9x
∴g(-10)= 9(-10)2 -9.(-10)
=900+90
= 990
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions