Questions in fun-lim

Select	Question
	$\underset{x\to 0}{\mathop{\lim }}\,\frac{\log \cos x}{x}=$
	$\underset{x\to 0}{\mathop{\lim }}\,\frac{\sin 2x}{x}=$
	If $f(9)=9$ , $f'(9)=4$ , then $\underset{x\to 9}{\mathop{\lim }}\,\frac{\sqrt{f(x)}-3}{\sqrt{x}-3}=$
	$\underset{x\to 0}{\mathop{\lim }}\,\frac{\|x\|}{x}=$
	$\underset{h\to 0}{\mathop{\lim }}\,\frac{\sqrt{x+h}-\sqrt{x}}{h}=$
	$\underset{x\to 0}{\mathop{\lim }}\,\frac{{{2}^{x}}-1}{{{(1+x)}^{1/2}}-1}=$
	$\underset{x\to 0}{\mathop{\lim }}\,\frac{1-\cos mx}{1-\cos nx}=$
	$\underset{x\to 0}{\mathop{\lim }}\,\frac{{{e}^{\sin x}}-1}{x}=$
	$\underset{x\to \infty }{\mathop{\lim }}\,\sqrt{x}(\sqrt{x+5}-\sqrt{x})=$
	$\underset{x\to 1}{\mathop{\lim }}\,\frac{x-1}{2{{x}^{2}}-7x+5}=$