(100²-99²)+(98²-97²)+…+(2²-1²)的值

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(100²-99²)+(98²-97²)+…+(2²-1²)的值
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(100²-99²)+(98²-97²)+…+(2²-1²)的值
(100²-99²)+(98²-97²)+…+(2²-1²)的值

(100²-99²)+(98²-97²)+…+(2²-1²)的值
=(100+99)(100-99)+(98+97)(98-97)+...(2+1)(2-1)
=100+99+98+97+...+2+1
=(1+100)*100/2
=5050