pliss bantu jawab gaes :) semua nya ya+pake cara:) -thankyou-

4. f(x) = (2x - 1)/(5 - 3x)
a. f(-1) = ?
f(-1) = (2(-1) - 1)/(5 - 3(-1))
f(-1) = (-2 - 1)/(5 + 3)
f(-1) = -3/8

b. f(x) = 2, x = ?
f(x) = (2x - 1)/(5 - 3x)
2 = (2x - 1)/(5 - 3x)
2(5 - 3x) = 2x - 1
10 - 6x = 2x - 1
10 + 1 = 2x + 6x
11 = 8x
x = 11/8

c. f(a) = 1 1/2 = 3/2, x = ?
f(a) = (2a - 1)/(5 - 3a)
3/2 = (2a - 1)/(5 - 3a)
3(5 - 3a) = 2(2a - 1)
15 - 9a = 4a - 2
15 + 2 = 4a + 9a
17 = 13a
a = 17/13

2. y = 2^x
a. x = 5, y = ?
y = 2^(5)
y = 32

b. y = 128, x = ?
y = 2^x
128 = 2^x
2^7 = 2^x (2^ coret)
x = 7


6. h(x) = x^3 - 1
a. h(2) = ?
h(2) = (2)^3 - 1
h(2) = 8 - 1
h(2) = 7

b. x = -2, h(x) = ?
h(-2) = (-2)^3 - 1
h(-2) = -8 - 1
h(-2) = -9

c. h(a) = 124, a = ?
h(a) = a^3 - 1
124 = a^3 - 1
124 + 1 = a^3
125 = a^3
5^3 = a^3 (^3 coret)
a = 5

d. h(x) = 0, x = ?
h(x) = x^3 - 1
0 = x^3 - 1
1 = x^3
1^3 = x^3 (^3 coret)
x = 1

^ = pangkat

maaf kalau salah
semoga membantu