(1+197)+(2+297)+(3+397)+…+(96+9697)+(97+9797).-数学

题目简介

(1+197)+(2+297)+(3+397)+…+(96+9697)+(97+9797).-数学

题目详情

(1+
1
97
)+(2+
2
97
)+(3+
3
97
)+…+(96+
96
97
)+(97+
97
97
)
题型:解答题难度:中档来源:不详

答案

(1+class="stub"1
97
)+(2+class="stub"2
97
)+(3+class="stub"3
97
)+…+(96+class="stub"96
97
)+(97+class="stub"97
97
),
=1+2+3+…+96+97+(class="stub"1
97
+class="stub"2
97
+class="stub"3
97
+…+class="stub"96
97
+class="stub"97
97
),
=(1+97)×97÷2+[(1+97)×97÷2×class="stub"1
97
],
=4753+[4753×class="stub"1
97
],
=4753+49,
=4802.

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