a = 2
r = 3
2*729 = 1458
729 = 3^6, so
S7 = 2(3^7-1)/(3-1) = 2*2186/2 = 2186
Find the sum of the G.p.2+6+18+54+...+1458
2 answers
Solve the equation simultaneously.1/3x+y=3,x+1/2y=4
2 answers