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Calculus 1: Indeterminate Forms and l'Hospital's Rule

Use l'Hospital's Rule to find the following limit
##\lim_{x\rightarrow 1} \frac{x^a - 1}{x^b - 1}##
Compute the following limit
##\lim_{x\rightarrow 0} \frac{\sin{(5x)}}{x}##
Use l'Hospital's Rule to find the limit
##\lim_{x\rightarrow 0} \frac{x^2 - 6x + 2}{x + 1}##
Evaluate the following limit
##\lim_{x\rightarrow \infty} \frac{\ln{(1 + e^{3x})}}{2x + 5}##
Explain why the following limit can not be found using l'Hospital's Rule then find the limit using a different method.
##\lim_{x\rightarrow \infty} \frac{x + \cos{(x)}}{x}##
Evalute ##\lim_{x\rightarrow 0} \frac{x + \cos{(2x)} - e^x}{x}##
Evaluate the following limit
##\lim_{\theta\rightarrow 0} \frac{\tan{(\theta)} - \theta}{\theta - \sin{(\theta)}}##
Evaluate the following limit
##\lim_{x\rightarrow 0} \frac{\sin{(3x)}}{\sin{(4x)}}##