Invers f(x)=x2 + 5x - 6?
Matematika
Riveral
Pertanyaan
Invers f(x)=x2 + 5x - 6?
1 Jawaban
-
1. Jawaban keruasriki
f(x) = y
x^2 + 5x - 6 = y
x^2 + 5x + 25/2 - 37/2 = y
x^2 + 5x + 25/2 = y + 37/2
(x + 5/2)^2= y + 37/2
x+ 5/2 = akar(y + 37/2)
x = akar(y + 37/2) - 5/2
f-1(x) = akar(x + 37/2) - 5/2