Question

Q. soal terlampir cepat dikerjakan​

Answer 1

a. HP = {-3, 5}

b. HP = {-6}

 

Pembahasan

–› Bagian a

 

–› Bagian b

Answer 2

Penjelasan dengan langkah-langkah:

Eksponen

1).

3^(x² + 2x - 11) = 81^(x + 1)

3^(x² + 2x - 11) = (3⁴)^(x + 1)

x² + 2x - 11 - 4x - 4 = 0

x² - 2x - 15 = 0

x² - 5x + 3x - 15 = 0

x(x - 5) + 3(x - 5) = 0

(x + 3)(x-5)= 0

x1 = -3 atau x2 = 5 ....HP = { -3 , 5 }

.

2). 5^2x / 25^(x + 7) = 25^(x - 1)

5^2x / (5²)^(x + 7) = (5²)^(x - 1)

5^(2x - 2x - 14) = 5^(2x - 2)

-14 = 2x - 2

-14+2= 2x

-12= 2x

x = -6

HP = { -6 }