1) show that a GP has a limiting sum if 0 (1/2 )a. 4) fjind the reange of values of the limiting sum of a GP with i) a = 6 , ii) a = -8, iii) a>0 iv) a

1) show that a GP has a limiting sum if 0<1-r><>

2) by calculating the common ratio show that there is no GP with 1st term 8 and limiting sum 2.

3) a GP has positive 1st term a and has a limiting sum S_{infinite ,}show that S_infinite> (1/2 )a.

4) fjind the reange of values of the limiting sum of a GP with  i) a = 6 , ii) a = -8, iii) a>0 iv) a<>