Question

Geometric Progression: x, xr, xr³, xr⁴, --- are said to be in geometric progression. Here, a is first term and r is common ratio. 

a) n^th term = xr ^{(n -1)}

b) Sum of n terms =	x (1 – rn)	, here r < 1
	(1 – r)

c) Sum of n terms =	x (rn – 1)	, here r > 1
	(r – 1)