How many terms at least of the arithmetic progression 1,4,7,10,.............are needed to give a sum greater than 590,starting from the first term of the arithmetic progression?

please help me(Crying)

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- Jan 8th 2010, 06:02 PMmastermin346Arithmetic progression problem
How many terms at least of the arithmetic progression 1,4,7,10,.............are needed to give a sum greater than 590,starting from the first term of the arithmetic progression?

please help me(Crying) - Jan 8th 2010, 06:29 PMskeeter
- Jan 8th 2010, 09:41 PMmastermin346
- Jan 8th 2010, 10:14 PMProve It
Do as you have been instructed.

You should be able to see that and

So

.

You know that

So

Solve for .

Choose the first whole value of that is greater than what you found... - Jan 8th 2010, 11:00 PMmastermin346
what do you mean by "Choose the first whole value of http://www.mathhelpforum.com/math-he...b31363a1-1.gif that is greater than what you found"???

- Jan 8th 2010, 11:23 PMmr fantastic