F5 數學 (20點)

2010-09-24 1:06 am
X - 8/X-3 = 1

(2^X)^2 - 5(2^X) + 4 = 0

7^2X - 56(7^x) + 343 = 0

sin^2 Θ = 3/2 cos Θ

2cos^2 Θ + sin Θ = 0

3sin^2 Θ + 8cos Θ - 7 = 0

回答 (1)

2010-09-25 6:05 am
參考: My Maths knowledge


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