(1-2²)+3²-4²+5²-6²+7²-8²+9²-10²

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/29 21:07:55
(1-2²)+3²-4²+5²-6²+7²-8²+9²-10²
xM 0#HjI&G)\FEzWg^!ރy aoLja|:#KStW-&C8߇x-'QW$Zt=*P2&i}$Jy$Rc!Z4I lB%wL9>Yxp{2&ԗp>Ń

(1-2²)+3²-4²+5²-6²+7²-8²+9²-10²
(1-2²)+3²-4²+5²-6²+7²-8²+9²-10²

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