" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
S=a-1 /*1-q
1-q
S(1-q)=a-1/:S
1-q=a-1 /-1
S
-q=a-1 /*(-1)
S
q=-(a-1)
S
S=a1-a1q^n /*(1-q)
1-q
s(1-q)=a1-a1q^n/+(a1q^n)
s(1-q)+a1q^n=a1
a1=s(1-q)+a1q^n
(1-q)*s=a /:s
1-q=a/s /-1
-q=a/s-1 /*(-1)
q=-a/s+1