જો $\alpha = \lim_{x \rightarrow \pi/4} \frac{\tan^{3} x - \tan x}{\cos(x + \pi/4)}$ અને $\beta = \lim_{x \rightarrow 0} (\cos x)^{\cot x}$ એ સમીકરણ $ax^{2} + bx - 4 = 0$ ના બીજ હોય,તો ક્રમયુક્ત જોડ $(a, b)$ શું થાય?

  • A
    $(1, -3)$
  • B
    $(-1, 3)$
  • C
    $(-1, -3)$
  • D
    $(1, 3)$

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જો $\lim _{x}$ ${\rightarrow 1} \frac{(5 x+1)^{1 / 3}-(x+5)^{1 / 3}}{(2 x+3)^{1 / 2}-(x+4)^{1 / 2}}=\frac{m \sqrt{5}}{n(2 n)^{2 / 3}}$,જ્યાં $\operatorname{gcd}(m, n)=1$,તો $8 m+12 n$ ની કિંમત શોધો.

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જો $f$ એક વાસ્તવિક વિધેય છે કે જેથી $f(4)=4$ અને $f^{\prime}(4)=16$ હોય,તો $\lim _{x \rightarrow 4} \frac{\sqrt{f(x)}-2}{\sqrt{x}-2} =$

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