If #f(x)=x+1# and #(f@g)(x)=x^2+3x+2#, which of the following is g(x)?
A) x+2
B) #x^2+3x#
C)#x^2+3x-1#
D)#x^2+3x+1#
E)#(x+1)^2(x+2)#
A) x+2
B)
C)
D)
E)
2 Answers
Mar 17, 2018
D)
Explanation:
Proposing
we have
now comparing coefficients
hence
so the answer is D)
Mar 18, 2018
Explanation:
Since the function
Quick check :
Thus
So