# simanga

Most popular questions and responses by simanga-
## maths

in GP the product of the Second term and fifth term is double the firth term. find the first term if the sum is first terms is 80 show that r^3+r^2+r+1=40 b. hence find the value of r c.show that the value of the sum of the nth term is 3^n-1

*asked on October 10, 2018*