Sumali sa IDNStudy.com at makuha ang mga sagot ng eksperto. Hanapin ang impormasyon na kailangan mo nang mabilis at madali sa pamamagitan ng aming komprehensibo at eksaktong platform ng tanong at sagot.
the problem is in geometric progression since you are given 'r' or the common ratio.
You have the formula for the sum of geometric progression as:
[tex]S_n = \frac{A_1(1-r^n)}{(1-r)} \\ you~are~given~the~following~data: \\ S_7 = 7651 \\ r=3 \\ n=7 \\ using ~the ~formula~you~can~find~A_1 \\ 7651 = \frac{A_1(1-3^7)}{1-3} \\ 7651 = \frac{A_1(1-2187)}{-2} \\ 7651(-2) = -2186A_1 \\ -15,302 = -2186A_1 \\ A_1 = 7[/tex]