> 数学 >
111..1(2004个1)- 222..2(1002个2)等于A×A 求A.这是原题
人气:139 ℃ 时间:2020-02-05 21:31:54
解答
111..1(2004个1)- 222..2(1002个2)
=111..1(2004个1)- 111..1(1002个1)- 111..1(1002个1)
=11...100...0(1002个1,1002个0)- 111..1(1002个1)
=111..1(1002个1)*(100...0(1002个0) -1)
=111..1(1002个1)*99...9(1002个9)
=111..1^2(1002个1)*9
=33...3^2(1002个3)
所以A=333...3(1002个3)
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版