pls tell me a formula to compute

0+2+6+12+20+32+...........+9900

9900 is the 100th term

the nos. are increasing in the order 2,4,6,8,10,......

i think it is a different type of arithmetic progression

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pls tell me a formula to compute

0+2+6+12+20+32+...........+9900

9900 is the 100th term

the nos. are increasing in the order 2,4,6,8,10,......

i think it is a different type of arithmetic progression

0+2+6+12+20+32+...........+9900

9900 is the 100th term

the nos. are increasing in the order 2,4,6,8,10,......

i think it is a different type of arithmetic progression

- miteshshanbhag
**Posts:**3**Joined:**Sun Sep 12, 2010 2:01 am**Reputation:****0**

Then try representing the set as

1+4+9+16+25...9801=1²+2²+...99²

1+2+3+4 +5+...99

____________________

2+6+12+20+30...9900

You have two new sets:

1+2+3+...99

and

1²+2²+3²+...99²

and you need to find their sum.

Now you need to find the formula for computing the value of each of the new sets, which is not that hard.

the first one is n*(n+1)/2

The second I leave to you.

ya...the 5th term is 30..not 32....sorry typing mistake...

the method is correct....great......

THANX A TON BUDDY.....

the method is correct....great......

THANX A TON BUDDY.....

- miteshshanbhag
**Posts:**3**Joined:**Sun Sep 12, 2010 2:01 am**Reputation:****0**

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