Finding the Smallest Positive Term in an Arithmetic Series (C1 Level)

[CathyLou]

Please could someone tell me the way to find the smallest positive term of an arithmetic series (C1 level) as I cannot find a formula anywhere.

Thank you.

Cathy

 

[cristo]

You could rearrange the formula $$S_n=\frac{n[2a_1+(n-1)d]}{2}$$, where n is the numbers of terms, S_n is the sum of the first n terms, d is the difference between the ith and (i+1)th term, and a₁ is the first term of the series.

 

[CathyLou]

You could rearrange the formula $$S_n=\frac{n[2a_1+(n-1)d]}{2}$$, where n is the numbers of terms, S_n is the sum of the first n terms, d is the difference between the ith and (i+1)th term, and a₁ is the first term of the series.

Okay. Thanks for your help.

Cathy