### L'Hopital's Rule 3 - exp, log, and inverse sine

Worked problem in calculus. L'Hopital's Rule is applied to (a) ln(x)/x at x=infty, (b) (1+x-e^x)/x^2 at x= 0, and (c) (sin^{-1}(x) - pi/2)/(x-1) at x=1-.

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