Let \( \mathrm{f} \) be a differential function such that \( \mathr...

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Let \( \mathrm{f} \) be a differential function such that \( \mathrm{f}^{\prime}(\mathrm{x})=7-\frac{3}{4} \)
P \( \frac{f(x)}{x},(x0) \) and \( f(1) \neq 4 \). Then \( \lim _{x \rightarrow 0} x f\left(\frac{1}{x}\right) \) :
[JEE Main - 2019 (January)]
(a) exists and equals \( \frac{4}{7} \)
(b) exists and equals 4.
(c) does not exist.
(d) exists and equls 0.
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