11. diketahui f(x)=3x + 4/5 invers fungsi f(x) adalah
a. f-¹(x) = 5x+4/3
b. f-¹(x) = 5x-4/3
c. f-¹(x) = 5x-3/4
d. f-¹(x) = 4x + 5/3
e. ƒ-¹(x) = 4x = 5/3![]()
a. f-¹(x) = 5x+4/3
b. f-¹(x) = 5x-4/3
c. f-¹(x) = 5x-3/4
d. f-¹(x) = 4x + 5/3
e. ƒ-¹(x) = 4x = 5/3
Penjelasan dengan langkah-langkah:
[tex]f(x) = \frac{3x + 4}{5} [/tex]
[tex]y = \frac{3x + 4}{5} [/tex]
[tex] \: [/tex]
—Ganti y = x
[tex] \frac{3y + 4}{5} = x[/tex]
[tex]3y + 4 = 5x[/tex]
[tex]3y = 5x - 4[/tex]
[tex]y = \frac{5x - 4}{3} [/tex]
[tex] {f}^{ - 1} (x) = \frac{5x - 4}{3} \: \text{jawabannya}[/tex]
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