Question

Ada yang bisa bantu???​

Answer 1

Jawabannya udh di foto yaa..

Answer 2

106]

1/2 × 2/3 × 3/4 × ... × n/(n + 1) = 2^-8

1/2 × 2/3 × 3/4 × ... × n/(n + 1) = 1/2^8

1 × 1 × 1 × ... × 1/(n + 1) = 1/256

1/(n + 1) = 1/256

n + 1 = 256

n = 256 - 1

n = 255 (C)

107]

[(x - 1/x)/(1 - 1/x)]^-2 = 3^-8

[(1 - 1/x)/(x - 1/x)]^2 = 1/3^8

(1 - 2/x + 1/x^2)/(x^2 - 2 + 1/x^2) = 1/6561

(x^2 - 2x + 1)/(x^4 - 2x^2 + 1) = 1/6561

(x - 1)^2/(x^2 - 1)^2 = 1/6561

[(x - 1)/(x^2 - 1)]^2 = 1/6561

(x - 1)/(x^2 - 1) = V(1/6561)

(x - 1)/(x^2 - 1) = 1/81

81(x - 1) = 1(x^2 - 1)

81x - 81 = x^2 - 1

x^2 - 81x + 81 - 1 = 0

x^2 - 81x + 80 = 0

(x - 80)(x - 1) = 0

x - 80 = 0 atau x - 1 = 0

x = 80 atau x = 1

(x = 1 tidak termasuk karena nilai x =/= 1)

maka nilai x = 80 (C)