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If f(x)=int0^x(sint)/t dt ,x >0, the...

If `f(x)=int_0^x(sint)/t dt ,x >0,` then (a)`f(x)` has a local maxima at `x=npi(n=2k ,k in I^+)` (b)`f(x)` has a local minima at `x=npi(n=2k ,k in I^+)` (c)`f(x)` has neither maxima nor minima at `x=npi(n in I^+)` (d)`(f)x` has local maxima at `x=npi(n=2k ,1, k in I^+)`

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RESONANCE DPP-JEE MAINS-All Questions
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