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標題:
F.4 MATHS
發問:
最佳解答:
(1) 36^(x+1) = 1 / 216^(1/5)==> 6^(2x+2) = 6^(-3/5)Therefore, 2x + 2 = -3/5==> 2x = -13/5==> x = -13/10 (2) 9^x - 2[3^(2x-1)] = 1==> 3(3^2x) - 2(3^2x) = 3 ?? (multiply each term by 3)==> 3^2x = 3^1Therefore2x = 1==> x = 1/2
其他解答:
F.4 MATHS
發問:
此文章來自奇摩知識+如有不便請留言告知
36^x+1 =1 / 5√2169^x – 2(3^2x-1) =1最佳解答:
(1) 36^(x+1) = 1 / 216^(1/5)==> 6^(2x+2) = 6^(-3/5)Therefore, 2x + 2 = -3/5==> 2x = -13/5==> x = -13/10 (2) 9^x - 2[3^(2x-1)] = 1==> 3(3^2x) - 2(3^2x) = 3 ?? (multiply each term by 3)==> 3^2x = 3^1Therefore2x = 1==> x = 1/2
其他解答:
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