Diketahui f(x) = 2x-3 dan g(x) = x²+x-7 Ditanya = tentukan a = (fog) (x) =? B= (fog) (5) =? C=(gof) (x) =? D=(gof) (4)=?
Matematika
ramabengkulu17
Pertanyaan
Diketahui f(x) = 2x-3 dan g(x) = x²+x-7
Ditanya = tentukan a = (fog) (x) =?
B= (fog) (5) =?
C=(gof) (x) =?
D=(gof) (4)=?
Ditanya = tentukan a = (fog) (x) =?
B= (fog) (5) =?
C=(gof) (x) =?
D=(gof) (4)=?
1 Jawaban
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1. Jawaban Andres2412
A.(fog) (x)=2(x²+x-7 )-3
=2x²+2x-14-3
= 2x²+2x-17
B.(fog) (5)= 2(5)²+2(5)-17
=50+10-17
=43
C.(gof) (x)=(2x-3)²+(2x-3)-7
= 4x²-12x+9+2x-3-7
= 4x²-10x-1
D.(gof) (4)= 4(4)²-10(4)-1
=64-40-1
=23