3^a=5 5^a=6 则75^a等于多少?
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3^a=5 5^a=6 则75^a等于多少?
3^a=5 5^a=6 则75^a等于多少?
3^a=5 5^a=6 则75^a等于多少?
3^a=5
5^a=6,25^a=36
75^a=3^a×25^a=5×36=180
3^a=5
5^a=6
75^a=(3*25)^a = 3^a * 25^a = 3^a * 5^(2a) =3^a * (5^a)^2 = 5 * 6^2 = 180
75^a=3^a*5^a*5^a
=5*6*6
=180