1.

If \(3e^x\ tan\ ydx + (1-e^x)sec^2\ ydy = 0\),then y is

A. tan y = c(1 + ex)3
B. y = c(1 - ex)3
C. log y = c(1 + ex)3
D. tan y = c(1 - ex)3
Answer» E.


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