求lim(x趋向于0) (1-x)*tan((派*x)/2)
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求lim(x趋向于0) (1-x)*tan((派*x)/2)
求lim(x趋向于0) (1-x)*tan((派*x)/2)
求lim(x趋向于0) (1-x)*tan((派*x)/2)
lim(x->0)[(1-x)tan(πx/2)]=lim(x->0)(1-x)*lim(x->0)[tan(πx/2)]=(1-0)*tan(0)=1*0=0.
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