Let alpha be a positive real number. Let f: m | vedclass

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(C) We need to evaluate $\lim_{x \rightarrow \alpha^{+}} g(x)$.Let $L = \lim_{x \rightarrow \alpha^{+}} \frac{2 \ln(\sqrt{x}-\sqrt{\alpha})}{\ln(e^{\s

Vedclass · Accepted Answer

$0.50$

Vedclass · Answer

(C) We need to evaluate $\lim_{x \rightarrow \alpha^{+}} g(x)$.Let $L = \lim_{x \rightarrow \alpha^{+}} \frac{2 \ln(\sqrt{x}-\sqrt{\alpha})}{\ln(e^{\sqrt{x}}-e^{\sqrt{\alpha}})}$. This is a $\frac{0}{0}$ indeterminate form.Using $L$'$H$ôpital's rule:$L = 2 \lim_{x}$ ${\rightarrow \alpha^{+}} \frac{\frac{1}{\sqrt{x}-\sqrt{\alpha}} \cdot \frac{1}{2\sqrt{x}}}{\frac{1}{e^{\sqrt{x}}-e^{\sqrt{\alpha}}} \cdot e^{\sqrt{x}} \cdot \frac{1}{2\sqrt{x}}}$$L = 2 \lim_{x \rightarrow \alpha^{+}} \frac{e^{\sqrt{x}}-e^{\sqrt{\alpha}}}{e^{\sqrt{x}}(\sqrt{x}-\sqrt{\alpha})}$$L = \frac{2}{e^{\sqrt{\alpha}}} \lim_{x}$ ${\rightarrow \alpha^{+}} \frac{e^{\sqrt{x}}-e^{\sqrt{\alpha}}}{\sqrt{x}-\sqrt{\alpha}}$Applying $L$'$H$ôpital's rule again to the limit part:$L = \frac{2}{e^{\sqrt{\alpha}}} \lim_{x}$ ${\rightarrow \alpha^{+}} \frac{e^{\sqrt{x}} \cdot \frac{1}{2\sqrt{x}}}{\frac{1}{2\sqrt{x}}} = \frac{2}{e^{\sqrt{\alpha}}} \cdot e^{\sqrt{\alpha}} = 2$.Now,$\lim_{x}$ ${\rightarrow \alpha^{+}} f(g(x)) = f(2) = \sin\left(\frac{2\pi}{12}\right) = \sin\left(\frac{\pi}{6}\right) = \frac{1}{2} = 0.50$.

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