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6. Find S15 for an arithmetic sequence with first term that is 5 and the fifteenth term is 47.
7. Find S10 for a geometric sequence having the first term of 4 and the common ratio is 5.
Can you please help me..
6. Find S15 for an arithmetic sequence with first term that is 5 and the fifteenth term is 47.
7. Find S10 for a geometric sequence having the first term of 4 and the common ratio is 5.
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Answer:
6.the common arithmetic sequence is 3
7.the 10th geometric sequence is 7812500
Step-by-step explanation:
5+3=8
7+3=10
9+3=12
11+3=14
hanggang 47
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7. 4 × 5 =20
20× 5=100
100 × 5=500
500 × 5=2500
2500 × 5=12500
12500 × 5=62500
62500 × 5=312500
312500× 5=1562500
1562500× 5=7812500