Q. 11 A5.0( 2 Votes )

If f and g are re

Answer :

Given: f and g are real functions such that f (x) = x2 + 7 and g (x) = 3x + 5


To find: f (3) + g (– 5)


Explanation: the given


f (x) = x2 + 7


Now putting x = 3 in above function, we get


f (3) = 32 + 7 = 9 + 7 = 16……..(i)


and also given


g (x) = 3x + 5


Now putting x = -5 in above function, we get


g (-5) = 3(-5) + 5 = -15 + 5 = -10…………(ii)


Adding equation (i) and (ii), we get


f (3) + g (– 5) = 16-10 = 6


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