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[" (A) "n!],[" 21.If "lim(x rarr0)(1+ax+...

[" (A) "n!],[" 21.If "lim_(x rarr0)(1+ax+bx^(2))^(2x)=e^(3)" ,then log "],[[" (A) "a=(3)/(2)" and "b in R],[" (C) "a=0" and "b=1]]

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