求极限 2x+3/2x+1的 x+3次方 x趋向无穷
求极限 2x+3/2x+1的 x+3次方 x趋向无穷
数学人气:185 ℃时间:2020-01-31 13:37:49
优质解答
lim(x→∞) (2x+3)/(2x+1)^( x+3)= lim(x→∞) [1+2/(2x+1)]^( x+3)= lim(x→∞) [1+2/(2x+1)]^[( 2x+1)/2+5/2]= lim(x→∞) [1+2/(2x+1)]^[( 2x+1)/2]*lim(x→∞) [1+2/(2x+1)]^[(5/2]=e
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