SOLUTION: Given f(x) =5x and g(x)=4x^2+2,find the following expressions. (a) (fog)(4) (b) (gof)(2) (c) (fof)(1) (d) (gog)(0)

Algebra ->  Expressions -> SOLUTION: Given f(x) =5x and g(x)=4x^2+2,find the following expressions. (a) (fog)(4) (b) (gof)(2) (c) (fof)(1) (d) (gog)(0)       Log On


   

Question 1168740: Given f(x) =5x and g(x)=4x^2+2,find the following expressions.
(a) (fog)(4)
(b) (gof)(2)
(c) (fof)(1)
(d) (gog)(0)
Answer by math_helper(2461) About Me  (Show Source):
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(a) fog(4) means f(g(x)) with x=4. g(4) = 4%284%29%5E2+%2B+2 = 66 and then f(66) = 5*(66) = 330

The others are done similarly, applying the appropriate functions.