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Let y=xex.y = \frac { x } { e ^ { x } } .

Question 20

Multiple Choice

Let y=xex.y = \frac { x } { e ^ { x } } . Then dy is


A) (1x) exdx\frac { ( 1 - x ) } { e ^ { x } d x }
B) x1exdx\frac { x - 1 } { e ^ { x } } d x
C) ex1xdx\frac { e ^ { x } } { 1 - x } d x
D) exx1dx\frac { e ^ { x } } { x - 1 } d x
E) ex1exdx\frac { e ^ { x } } { 1 - e ^ { x } } d x

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