The value of lim_{x to 0} (frac{8}{x^8}) [1 - | vedclass

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Question

(B) Let the expression be $L = \lim_{x 	o 0} \frac{8}{x^8} [1 - \cos \frac{x^2}{2} - \cos \frac{x^2}{4} + \cos \frac{x^2}{2} \cos \frac{x^2}{4}]$.Fac

Vedclass · Accepted Answer

$\frac{1}{32}$

Vedclass · Answer

(B) Let the expression be $L = \lim_{x 	o 0} \frac{8}{x^8} [1 - \cos \frac{x^2}{2} - \cos \frac{x^2}{4} + \cos \frac{x^2}{2} \cos \frac{x^2}{4}]$.Factor the expression inside the bracket: $[(1 - \cos \frac{x^2}{2}) - \cos \frac{x^2}{4}(1 - \cos \frac{x^2}{2})] = (1 - \cos \frac{x^2}{2})(1 - \cos \frac{x^2}{4})$.Using the limit formula $\lim_{	heta 	o 0} (1 - \cos 	heta) = \frac{	heta^2}{2}$, we have:$1 - \cos \frac{x^2}{2} \approx \frac{1}{2} (\frac{x^2}{2})^2 = \frac{x^4}{8}$.$1 - \cos \frac{x^2}{4} \approx \frac{1}{2} (\frac{x^2}{4})^2 = \frac{x^4}{32}$.Substituting these into the limit:$L = \lim_{x 	o 0} \frac{8}{x^8} \cdot (\frac{x^4}{8}) \cdot (\frac{x^4}{32}) = \lim_{x 	o 0} \frac{8 \cdot x^8}{8 \cdot 32 \cdot x^8} = \frac{1}{32}$.

The value of $\lim_{x \to 0} (\frac{8}{x^8}) [1 - \cos \frac{x^2}{2} - \cos \frac{x^2}{4} + \cos \frac{x^2}{2} \cdot \cos \frac{x^2}{4}]$ is equal to:

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