Use L'Hospital's rule to find the limit. (a) lim x-1 x²-3x + 2 x² - 1 sin (2x) 2-0 sin (7x) (b) lim

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A: x→3+ limx2-2x-3(x-3)3=x→3+lim(x-3)(x+1)(x-3)3=x→3+limx+1(x-3)2=∞

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A: 80. Given:

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