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Let f g be functions from R to R define...

Let f g be functions from R to R defined as
`f (x) ={{:( 7x ^(2) + x - 8 "," x le 1),( 4x + 5"," 1 lt x le 7"," g (x) = ),(78x + 3"," x gt 7):}{{:(|x|"," x lt -3),(0"," -3 le x lt 2),(x ^(2) + 4"," x ge 2):}` Then

A

(fog) `(-3) = 8`

B

(fog) `(9) = 683`

C

(gof) `(0) =- 8`

D

(gof) `(6) = 427`

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The correct Answer is:
B
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