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Let u(x) and v(x) be differentiable func...

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

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