diketaui fungsi f(x)=2x+5,f(3)=a dan f(b)=9 berapa nilai a+b
Matematika
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Pertanyaan
diketaui fungsi f(x)=2x+5,f(3)=a dan f(b)=9 berapa nilai a+b
1 Jawaban
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1. Jawaban Mutiarafn
F(x) = 2x + 5
F(3) = a
<=> 2(3) + 5 = a
<=> 6 + 5 = a
<=> 11 = a
F(b) = 9
<=> 2(b) + 5 = 9
<=> 2b + 5 = 9
<=> 2b = 9 - 5
<=> 2b = 4
<=> b = 2
Nilai a + b = 11 + 2 = 13