Question
$\mathop {\lim }\limits_{x \to \infty } \frac{{(x - 1)(2x + 3)}}{{{x^2}}} = $
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$f(x)=\left\{\begin{array}{cc}x^{5} \sin \left(\frac{1}{x}\right)+5 x^{2} ,& x<0 \\ 0 & , \quad x=0 \\ x^{5} \cos \left(\frac{1}{x}\right)+\lambda x^{2} & , \quad x>0\end{array}\right.$ द्वारा परिभाषित है। $\lambda$ का मान जिसके लिए $f^{\prime \prime}(0)$ का अस्तित्व है