if-x-a-1-r-n-1-r-make-r-the-subject-of-the-formula-

Question Number 9323 by uchechukwu okorie favour last updated on 30/Nov/16

i f x = \frac{a (1 - r^{n})}{1 - r} m a k e r t h e

s u b j e c t o f t h e f o r m u l a

Commented by geovane10math last updated on 30/Nov/16

x = \frac{a (- r^{n} + 1)}{- r + 1} = \frac{a [- (r^{n} - 1)]}{- (r - 1)}

x = \frac{- a (r^{n} - 1)}{- (r - 1)} = \frac{a (r^{n} - 1)}{r - 1}

x i s t h e s u m o f t e r m s o f a G e o m e t r i c

P r o g r e s s i o n

r a t i o = r

f i r s t t e r m = a