diketahui f(x) =x²+2x+1
g(x)=x+2
carilah nilai
a.fog(x)
b.gof(x)
g(x)=x+2
carilah nilai
a.fog(x)
b.gof(x)
Jawaban:
a. fog(×) =f(g(×))
=f(×+2)
=(×+2)²+2×+1
=x² +2x +2x+ 4 +2x +1
=x²+6x+5
b. gof(x) = g(f(x)
= g(x²+2x+1)
= (x²+2x+1) +2
= x² +2x +3
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