આપેલ લક્ષની કિંમત શોધો: $\mathop {\lim }\limits_{x \to 0} \frac{ax+b}{cx+1}$

$\lim _{x \rightarrow 3} \frac{x^3-27}{x^2-9} = $

જો $a = \lim_{x \rightarrow 0} \frac{\sqrt{1+\sqrt{1+x^4}}-\sqrt{2}}{x^4}$ અને $b = \lim_{x \rightarrow 0} \frac{\sin^2 x}{\sqrt{2}-\sqrt{1+\cos x}}$ હોય,તો $ab^3$ ની કિંમત શોધો.

$\lim _{n \rightarrow \infty} \frac{1}{n^3} \sum_{k=1}^n k^2 x = $

$\mathop {\lim }\limits_{x \to \infty } {\left( {1 + \frac{2}{x}} \right)^x} = $

$\lim _{x \rightarrow 0} \frac{x^2 \log (\cos x)}{\log (1+x^2)} = $