The seventh and tenth terms of a geometric sequence are 7 and 21, respectively. What is the 8th term of this progression?

Guest Sep 8, 2021

#1**+1 **

From the 7th to the 10th terms is multiplication by r three times

7 * r * r * r = 21 solve for 'r'

then the 8th term is 7 * r

ElectricPavlov Sep 8, 2021