diberikan f(x)=ax +b . jika f(-3) = -17 dan f(1) = 3 nilai f (-2)+f (3)
Matematika
fina1102
Pertanyaan
diberikan f(x)=ax +b . jika f(-3) = -17 dan f(1) = 3 nilai f (-2)+f (3)
1 Jawaban
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1. Jawaban coolfire
F(x) =ax+b
F(-3)=a(-3)+b=-17
- 3a+b=-17
F(1)=a(1)+b=3
A+b=3
Eliminasi b
-3a+b=-17
A+b=3
---------------¯
-4a=-20
A=5
Subtitusi
A+b=3
5+b=3
B=3-5
=-2
=F(-2)+f(3)
=-2a+b + 3a+b
=-2(5)+(-2)+3(5)+(-2)
=-10+(-2)+15+(-2)
=-12+13
=1