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If the curves y=2\ e^x and y=a e^(-x) in...

If the curves `y=2\ e^x` and `y=a e^(-x)` intersect orthogonally, then `a=` `1//2` (b) `-1//2` (c) `2` (d) `2e^2`

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`1//2`
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CBSE COMPLEMENTARY MATERIAL-APPLICATION OF DERIVATIVES-2 MARK QUESTIONS
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