Question #c610c
1 Answer
Dec 12, 2017
Explanation:
#"the nth term of a geometric sequence is"#
#•color(white)(x)a_n=ar^(n-1)#
#"where a is the first term and r the common ratio"#
#•color(white)(x)r=a_2/a_1=a_3/a_2=....=a_n/a_(n-1)#
#rArrr=216/648=72/216=1/3#
#rArra_8=648xx(1/3)^7=648/2187=8/27#
