(2²+4²+6²+8²+10²)-(1²+3²+5²+7²+9²)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 14:36:28
(2²+4²+6²+8²+10²)-(1²+3²+5²+7²+9²)(2²+4²

(2²+4²+6²+8²+10²)-(1²+3²+5²+7²+9²)
(2²+4²+6²+8²+10²)-(1²+3²+5²+7²+9²)

(2²+4²+6²+8²+10²)-(1²+3²+5²+7²+9²)
(2²+4²+6²+8²+10²)-(1²+3²+5²+7²+9²)
=(2²-1²)+(4²-3²)+(6²-5²)+(8²-7²)+(10²-9²)
=(2+1)(2-1)+(4+3)(4-3)+(6+5)(6-5)+(8+7)(8-7)+(10+9)(10-9)
=3+7+11+15+19
=55