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Question

evaluate integration of (x-1 /x2) ex dx

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Solution

Let I = x-1x2 ex dx=1x - 1x2 ex dx=1x . ex dx - 1x2 . ex dx=1x × ex dx - ddx1x ×ex dx dx - 1x2 . ex dx=1x. ex - -1x2 . ex dx - 1x2 . ex dx=exx + 1x2 . ex dx - 1x2 . ex dx=exx + C

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