a+1/a=4,则a²+1/a²一等于?请不要用^,*,这种符号,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 19:07:32
![a+1/a=4,则a²+1/a²一等于?请不要用^,*,这种符号,](/uploads/image/z/11563645-13-5.jpg?t=a%2B1%2Fa%3D4%2C%E5%88%99a%26%23178%3B%2B1%2Fa%26%23178%3B%E4%B8%80%E7%AD%89%E4%BA%8E%3F%E8%AF%B7%E4%B8%8D%E8%A6%81%E7%94%A8%5E%2C%2A%2C%E8%BF%99%E7%A7%8D%E7%AC%A6%E5%8F%B7%2C)
a+1/a=4,则a²+1/a²一等于?请不要用^,*,这种符号,
a+1/a=4,则a²+1/a²一等于?请不要用^,*,这种符号,
a+1/a=4,则a²+1/a²一等于?请不要用^,*,这种符号,
a²+1/a²
=a²+2+1/a²-2
=(a+1/a)²-2
=16-2
=14
你好!
(a+a/a)=4
那么两边平方,得到
(a+1/a)²=16
a²+1/a²+2a*1/a=16
a²+1/a²=16-2=14