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If the subnormal at any point on the cur...

If the subnormal at any point on the curve `y =3 ^(1-k). K ^(k)` is of constant length the k equals to :

A

`1/2`

B

1

C

2

D

0

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The correct Answer is:
A
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VIKAS GUPTA (BLACK BOOK) ENGLISH-APPLICATION OF DERIVATIVES -EXERCISE (SUBJECTIVE TYPE PROBLEMS)
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