1+2+3+4+5+6……+100000

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1+2+3+4+5+6……+100000

1+2+3+4+5+6……+100000
1+2+3+4+5+6……+100000

1+2+3+4+5+6……+100000
1+2+3+4+5+6……+100000
=(1+100000)+(2+99999)+(3+99998)+……+(50000+50001)
=100001+100001+100001+……+100001 [共有50000个100001相加]
=100001×50000
=5000050000

1+2+3+4+5+6……+100000
=(1+100000)*100000/2
=5000050000

1+2+3+4+5+6……+100000
=(1+100000)×100000÷2
=5000050000
希望能帮到你~

=(1+100000)+(2+99999)+(3+99998)+......+(49999+50002)+(50000+50001)
=100001*50000
=5000050000