3x4+33x44+333x444-2x5-22x55-222x555
=_________
3x4+33x44+333x444-2x5-22x55-222x555
2007-04-30 3:02 am
回答 (6)
2007-04-30 5:32 am
✔ 最佳答案
3x4+33x44+333x444-2x5-22x55-222x555=12+33x44+333x444-2x5-22x55-222x555
=12+1452+333x444-2x5-22x55-222x555
=12+1452+147852-2x5-22x55-222x555
=12+1452+147852-10-22x55-222x555
=12+1452+147852-10-1210-222x555
=12+1452+147852-10-1210-123210
=1464+147852-10-1210-123210
=149316-10-1210-123210
=149306-1210-123210
=148096-123210
=24886
I think it's right !! ^^
參考: me
2007-04-30 3:23 am
=24886
2007-04-30 3:13 am
3x4+11^2x(3x4)+111^2x(3x4)-2x5-11^2x(2x5)-111^2(2x5)
=(3x4)(1+121+12321)-(2x5)(1+121+12321)
=(1+121+12321)(3x4-2x5)
=12443x2
=24886
=(3x4)(1+121+12321)-(2x5)(1+121+12321)
=(1+121+12321)(3x4-2x5)
=12443x2
=24886
參考: 自己
2007-04-30 3:12 am
3x4+33x44+333x444-2x5-22x55-222x555
=24886
=24886
2007-04-30 3:09 am
3x4+33x44+333x444-2x5-22x55-222x555
=12x(1+11^2+111^2)-10x(1+11^2+111^2)
=2x(1+11^2+111^2)
=24886
=12x(1+11^2+111^2)-10x(1+11^2+111^2)
=2x(1+11^2+111^2)
=24886
收錄日期: 2021-04-13 17:05:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070429000051KK04466