来自陈闽的问题
一道有关分数指数幂的数学题已知x+x^(-1)=4,求下列各式的值(1)x^(1/2)+x^(-1/2)(2)x^(3/2)+x^(-3/2)(3)x^(1/2)-x^(-1/2)
一道有关分数指数幂的数学题
已知x+x^(-1)=4,求下列各式的值
(1)x^(1/2)+x^(-1/2)
(2)x^(3/2)+x^(-3/2)
(3)x^(1/2)-x^(-1/2)
1回答
2020-03-21 00:51