lim(x趋向无穷)(cos1/根号x)^2x
lim(x趋向无穷)(cos1/根号x)^2x
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求下列式子的值(1)lim(x趋向无穷) (2x+7)/[(x-1)(x+2)]=?(2)lim(x趋向无穷) (3x^