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Each row of the table contains the values of three quantities a1, d, an, n, or Sm of an arithmetic sequence. Complete the table below by solving the other two. Write your answer on your answer sheet. ai d an S. 1. 1 2 5__10__ 2. 5__38 20__ 3. 9 4__15__​

Sagot :

Answer:

1.an=47;Sn=245

2.n=12;Sn=-48

3.a1=43.5;Sn=585

4.an=68;n=10

5.a1=9;d=-2/7

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