$\lim\limits_{n \rightarrow \infty} 6 \tan \left\{\sum\limits_{r=1}^{n} \tan ^{-1}\left(\frac{1}{r^{2}+3 r+3}\right)\right\}$ નું મૂલ્ય કેટલું થાય?

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $6$

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$\lim _{x \rightarrow 0}\left(\frac{1+\tan x}{1+\sin x}\right)^{\operatorname{cosec} x}=$

ધારો કે $a_{1}, a_{2}, \dots, a_{n}$ એ નિશ્ચિત વાસ્તવિક સંખ્યાઓ છે અને વિધેય $f(x) = (x - a_{1})(x - a_{2}) \dots (x - a_{n})$ વ્યાખ્યાયિત કરો. $\lim_{x \to a_{1}} f(x)$ શું છે? કોઈ $a \neq a_{1}, a_{2}, \dots, a_{n}$ માટે,$\lim_{x \to a} f(x)$ ની ગણતરી કરો.

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