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limit求极限时出现的问题。
我也不知道为啥算不出来，但是做个变量代换以后是可以算的 % y = 1 - 2 / pi * atan( x ); % 换元，x 趋于 ∞ 时，y 趋于 0 % x = tan( pi/2 - pi/2 * y ); % 换元关系式 f = ( 1 ...
2 years ago | 0
| accepted
