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The curves y=a e^x and y=b e^(-x) cut or...

The curves `y=a e^x` and `y=b e^(-x)` cut orthogonally, if `a=b` (b) `a=-b` (c) `a b=1` (d) `a b=2`

A

a=b

B

ab=-b

C

ab=1

D

ab=2

Text Solution

Verified by Experts

The correct Answer is:
C
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