A
alicewen
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例:
a1 a2 a3 b1 b2 b3 c1 c2 c3 .......
1 10 100 2 20 200 3 30 300 .......
2 20 200 3 30 300 4 40 400 .......
3 30 300 4 40 400 5 50 500 .......
4 40 400 5 50 500 6 60 600 .......
5 50 500 6 60 600 7 70 700 .......
如何求出用公式求出每行的a1+b1+c1,a2+b2+b2,a3+b3+c3...之和,中间跳跃类加可变,事例为3,也可以为n,例an+bn+cn+.....
a1 a2 a3 b1 b2 b3 c1 c2 c3 .......
1 10 100 2 20 200 3 30 300 .......
2 20 200 3 30 300 4 40 400 .......
3 30 300 4 40 400 5 50 500 .......
4 40 400 5 50 500 6 60 600 .......
5 50 500 6 60 600 7 70 700 .......
如何求出用公式求出每行的a1+b1+c1,a2+b2+b2,a3+b3+c3...之和,中间跳跃类加可变,事例为3,也可以为n,例an+bn+cn+.....