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Question

If f:RR,g:RR are define by f(x)=5x3,g(x)=x2+3, then (gof1)(3) is equal to

A
253
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B
11125
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C
925
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D
25111
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Solution

The correct option is C 11125
f(x)=5x3

f1(x)=x+35

g(x)=x2+3

(gof1)(3)=g(f1(3))=g(65)=11125

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