Mathematics, 30.03.2021 21:00 soliseric879

WILL MARK BRAINLIEST 1. If a4 = -320 and r= -4 find a1
2. If a1= 3645 and a6 =15 find a3
3. Given the geometric sequence find s8 (3,-12,48,-192...)
4. Given the geometric sequence find s25 (1,5/3,7/3,3,11/3...)

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WILL MARK BRAINLIEST 1. If a4 = -320 and r= -4 find a1
2. If a1= 3645 and a6 =15 find a3