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a. 2^(2x+6) = 1
2^(2x+6) = 2^0
2x + 6 = 0
2x = -6
x = -6 / 2
x = -3
Jadi nilai x adalah -3
b. (5√5)^(-5x-10) = 1
(5√5)^(-5x-10) = 5^0
-5x - 10 = 0
-5x = 10
x = 10 / -5
x = -2
Jadi nilai x adalah -2.