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Tolong jadikan jawaban yang terbaik
f(-7)=-7a+b=3
f(2)=2a+b=-15(dikurangi)
= -9a =-18
= a =-2
f(-7)=-7×(-2)+b=3
=14+b =3
= b =3-14
= b =-11
*jadi, f(x)=-2x-11
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