f(×)=3/5(×+4).jika f^-1(a)=-9,tentukan nilai a
Matematika
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Pertanyaan
f(×)=3/5(×+4).jika f^-1(a)=-9,tentukan nilai a
1 Jawaban
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1. Jawaban AR1412
f(x)= 3/5 (x+4)
y=3/5 (x+4)
5y/3=x+4
x= 5y/3 -4
f^-1 (x)=5x/3 -4
f^-1(a)= 5a/3 -4
-9=5a/3 -4
5a/3= -5
5a= -15
a= -3