diketahui f(x) = 5x + 1 dan f - 1(a)
ditanyakan ., nilai a..??
dijawab :
f(x) = y = 5x + 1
5x = y - 1
x = (y - 1) / 5
f - 1(x) = (x - 1) / 5
f - 1(a) = (a - 1) / 5
3 = (a - 1) /5
a - 1 = 15
a = 15 + 1
a = 16
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diketahui f(x) = 5x + 1 dan f - 1(a)
ditanyakan ., nilai a..??
dijawab :
f(x) = y = 5x + 1
5x = y - 1
x = (y - 1) / 5
f - 1(x) = (x - 1) / 5
f - 1(a) = (a - 1) / 5
3 = (a - 1) /5
a - 1 = 15
a = 15 + 1
a = 16