3个有关大学数学函数极限的题,在线等,急急急急急
三道题都是将 x 的值直接代入 。
lim x → 1 ( x - 2 )/( x^2 + 1 ) = ( 1 - 2 )/( 1 + 1 ) = -1/2;
lim x → 0 cosx = cos0 = 1;
lim x → (1+) √[ x - 1 ] = √[ (1+) - 1 ] = 0;
是要证明吗?
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三道题都是将 x 的值直接代入 。
lim x → 1 ( x - 2 )/( x^2 + 1 ) = ( 1 - 2 )/( 1 + 1 ) = -1/2;
lim x → 0 cosx = cos0 = 1;
lim x → (1+) √[ x - 1 ] = √[ (1+) - 1 ] = 0;
是要证明吗?