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Let u(x) and v(x) are differentiable fun...

Let `u(x)` and `v(x)` are 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 equal to 1 (b) 0 (c) 7 (d) `-7`

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