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dik : Fungsi f dan g ditentukan oleh f(x) = 2-5x dan g(x) = x+5. (f invers bundaran g invers)
Pembahasan
jawab.
f(x) = 2 - 5x dan g(x) = x + 5
(f o g) (x) = 2 - 5 (x + 5)
= 2 - 5x - 25
= - 5x - 23
infersnya = y = - 5x - 23
karena y = x maka
y + 23 = - 5x
x =
jadi nilai (f o g)- infers =
Soal
(n) = (g invers bundaran f infers) (n)
f(x) = 2 - 5x dan g(x) = x + 5
Pembahasan
jawab.
(g o f) (n) = (2 - 5x ) + 5
= 7 - 5x
(g o f) infers nya = y = 7 - 5x
karena y = x maka
y - 7 = -5x
x =
nilai x =>
untuk nilai n saya masih ragu ragu
munkin nilai n = 7 - 5x
n = 7 / 5
Semoga membantu :) D