Math problem!. Please show detail?
回答 (1)
2016-01-20 5:34 am
✔ 最佳答案
y = 7ˣln y = ln 7ˣ
ln y = x ln 7
(1/y) dy/dx = (1) ln 7
dy/dx = y ln 7
dy/dx = 7ˣ ln 7
∴ C. 7ˣ (ln 7)
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