payshencec21
payshencec21
27-03-2018
Mathematics
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musiclover10045
musiclover10045
27-03-2018
replace x with -2
y = 12 * 3^-2
y = 12 * 1/9
y = 4/3
Answer is A
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mreijepatmat
mreijepatmat
27-03-2018
Reminder:
a⁻ˣ = 1/aˣ
y= (12).3ˣ for x = -2 --> (12).3⁻2 ==> (12) . 1/3² = 12/9 = 4/3 (answer A)
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