If \( \lim _{x \rightarrow \infty}\left([f(x)]+x^{2}\right)\{f(x)\}... VIDEO
If \( \lim _{x \rightarrow \infty}\left([f(x)]+x^{2}\right)\{f(x)\}=k \), where \( f(x)=\frac{\tan x}{x} \) and \( [\cdot] \)https://bit.ly/YTAI_PWAP https://www.pw.live
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\[
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\text { Let } f(x)=f_{1}(x)-2 f_{2}(x) \text {,...
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