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21. Some Special Series
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Q4 of 60 Page 21

If , then


Solving we get n=20



Substituting the value



10(7)(41)


2870

More from this chapter

All 60 →
2

The sum of the series :

3

The value of is equal to

5

If , then Sn is equal to

6

If to n terms is S. Then, S is equal to

Questions · 60
21. Some Special Series
1 2 3 4 5 6 7 8 8 8 8 9 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10
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