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Find a1 for each geometric series described. Sn=1550, n=3, r=5

Find a1 for each geometric series described. Sn=1550, n=3, r=5
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Find a1 for each geometric series described. Sn=1550, n=3, r=5

asked
User Polarise
by
8.2k points

1 Answer

7 votes

Answer:

An=31n-49

Explanation:

1550=A1(1-5^3) / 1-5 =31

1550=A1 × 31 / 31

A1= 50

answered
User Daniel Margol
by
8.6k points
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