jika f(x)=2x+5, maka f-1(3)= .... tolongg
Matematika
safitria1
Pertanyaan
jika f(x)=2x+5, maka f-1(3)= ....
tolongg
tolongg
1 Jawaban
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1. Jawaban alifiandirm
y = 2x + 5
2x = y - 5
x = (y - 5)/2
f-1(x) = (x - 5)/2
f-1(3) = (3-5)/2 = -2/2 = -1