fungsi f(x) = ax -6 jika f(2) = 1, maka f(5)= A.11 1/2 B. 7 1/2 C. 3 1/2 D.-1
Matematika
restidelia
Pertanyaan
fungsi f(x) = ax -6 jika f(2) = 1, maka f(5)= A.11 1/2 B. 7 1/2 C. 3 1/2 D.-1
1 Jawaban
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1. Jawaban DimasRaka
f(x) = ax - 6
f(2) = a(2) - 6
1 = 2a - 6
7 = 2a
7/2 = 2a
3 ½ = a
f(5) = a(5) - 6
= 7/2 × 5 - 6
= 35/2 - 6
= 35/2 - 12/2
= 23/2
= 11 ½