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观察下列各式:13+23=14×4×9=14×22×3213+23+33=36=14×9×16=14×32×4213+23+33+43=100=14×16×25=14×42×52(1)计算:13+23+33+43+…+103的值;(2)猜想:13+23+33+43+…+n3的值.(3)计算:513+523+533+…+993+1003的值
题目详情
观察下列各式:
13+23=
×4×9=
×22×32
13+23+33=36=
×9×16=
×32×42
13+23+33+43=100=
×16×25=
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.观察下列各式:
13+23=
×4×9=
×22×32
13+23+33=36=
×9×16=
×32×42
13+23+33+43=100=
×16×25=
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
33
×4×9=
×22×32
13+23+33=36=
×9×16=
×32×42
13+23+33+43=100=
×16×25=
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 4 1 1 4 4
×22×32
13+23+33=36=
×9×16=
×32×42
13+23+33+43=100=
×16×25=
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 4 1 1 4 4 22
333
×9×16=
×32×42
13+23+33+43=100=
×16×25=
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 4 1 1 4 4
×32×42
13+23+33+43=100=
×16×25=
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 4 1 1 4 4 22
3333
×16×25=
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 4 1 1 4 4
×42×52
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 4 1 1 4 4 22
33333
33333
33333
13+23=
1 |
4 |
1 |
4 |
13+23+33=36=
1 |
4 |
1 |
4 |
13+23+33+43=100=
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.观察下列各式:
13+23=
1 |
4 |
1 |
4 |
13+23+33=36=
1 |
4 |
1 |
4 |
13+23+33+43=100=
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
33
1 |
4 |
1 |
4 |
13+23+33=36=
1 |
4 |
1 |
4 |
13+23+33+43=100=
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 |
4 |
1 |
4 |
13+23+33=36=
1 |
4 |
1 |
4 |
13+23+33+43=100=
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 |
4 |
333
1 |
4 |
1 |
4 |
13+23+33+43=100=
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 |
4 |
1 |
4 |
13+23+33+43=100=
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 |
4 |
3333
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 |
4 |
1 |
4 |
(1)计算:13+23+33+43+…+103的值;
(2)猜想:13+23+33+43+…+n3的值.
(3)计算:513+523+533+…+993+1003的值.
1 |
4 |
33333
33333
33333
▼优质解答
答案和解析
(1)133+233+333+433+…+1033
=
×102×112
=3025;
(2)由题意可得,
13+23+33+43+…+n3=
×n2×(n+1)2;
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
×1002×1012-
×502×512
=23876875.
1 4 1 1 14 4 4×102×112
=3025;
(2)由题意可得,
13+23+33+43+…+n3=
×n2×(n+1)2;
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
×1002×1012-
×502×512
=23876875. 2×112
=3025;
(2)由题意可得,
13+23+33+43+…+n3=
×n2×(n+1)2;
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
×1002×1012-
×502×512
=23876875. 2
=3025;
(2)由题意可得,
133+233+333+433+…+n33=
×n2×(n+1)2;
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
×1002×1012-
×502×512
=23876875.
1 4 1 1 14 4 4×n2×(n+1)2;
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
×1002×1012-
×502×512
=23876875. 2×(n+1)2;
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
×1002×1012-
×502×512
=23876875. 2;
(3)5133+5233+5333+…+9933+10033
=133+233+333+433+…+10033-(133+233+333+433+…+5033)
=
×1002×1012-
×502×512
=23876875.
1 4 1 1 14 4 4×1002×1012-
×502×512
=23876875. 2×1012-
×502×512
=23876875. 2-
1 4 1 1 14 4 4×502×512
=23876875. 2×512
=23876875. 2
=23876875.
=
1 |
4 |
=3025;
(2)由题意可得,
13+23+33+43+…+n3=
1 |
4 |
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
1 |
4 |
1 |
4 |
=23876875.
1 |
4 |
=3025;
(2)由题意可得,
13+23+33+43+…+n3=
1 |
4 |
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
1 |
4 |
1 |
4 |
=23876875. 2×112
=3025;
(2)由题意可得,
13+23+33+43+…+n3=
1 |
4 |
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
1 |
4 |
1 |
4 |
=23876875. 2
=3025;
(2)由题意可得,
133+233+333+433+…+n33=
1 |
4 |
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
1 |
4 |
1 |
4 |
=23876875.
1 |
4 |
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
1 |
4 |
1 |
4 |
=23876875. 2×(n+1)2;
(3)513+523+533+…+993+1003
=13+23+33+43+…+1003-(13+23+33+43+…+503)
=
1 |
4 |
1 |
4 |
=23876875. 2;
(3)5133+5233+5333+…+9933+10033
=133+233+333+433+…+10033-(133+233+333+433+…+5033)
=
1 |
4 |
1 |
4 |
=23876875.
1 |
4 |
1 |
4 |
=23876875. 2×1012-
1 |
4 |
=23876875. 2-
1 |
4 |
=23876875. 2×512
=23876875. 2
=23876875.
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