f(x) = 2 x + 5 g(x) = 1 - 3x a) h(x) = g(x) ____ f(x) = ? b) h^-1 (x) =?
Matematika
vio2341
Pertanyaan
f(x) = 2 x + 5
g(x) = 1 - 3x
a) h(x) = g(x)
____
f(x) = ?
b) h^-1 (x) =?
g(x) = 1 - 3x
a) h(x) = g(x)
____
f(x) = ?
b) h^-1 (x) =?
1 Jawaban
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1. Jawaban aan1975
a. misal g(x)= 0
maka ;
g(x) = 1 - 3x
0 = 1 -3x
3x = 1
x = 1/3
f(x) = 2x + 5
= 2 1/3 + 5
f(x) = 7 1/3
b. h(x) = g(x)
h^-1 (x) = 1/(1 - 3x)
= 1/(1 - 3 . 7 1/3)
= 1/ (1 - 21 1/3)
= 1/(-61/3)
= 1 x(-3/61)
= -3/61