Respuesta :

mathstudent55

Answer:

-4

Step-by-step explanation:

(1/9)^(a + 1) = 81^(a + 1) × 27^(2 - a)

[3^(-2)]^(a + 1) = (3^4)^(a + 1) × (3^3)^(2 - a)

3^(-2a - 2) = 3^(4a + 4) × 3^(6 - 3a)

3^(-2a - 2) = 3^(4a + 4 + 6 - 3a)

-2a - 2 = a + 10

-3a = 12

a = -4