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Let `u(x) and v(x)` be differentiable functions such that `(u(x))/(v(x))=7` If `(u^(prime)(x))/(v^(prime)(x))=p and ((u(x))/(v(x)))^'=q ,then (p+q)/(p-q)` has the value
(a) 1 (b) 0 (c) 7 (d) `-7`

A

1

B

0

C

7

D

-7

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A
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