CayceK779538 CayceK779538

30-10-2022
Mathematics

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Find the 1st term, last term and the sum for the infinite arithmetic series

Find the 1st term last term and the sum for the infinite arithmetic series class=

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MohidZ576526 MohidZ576526

30-10-2022

First term:

[tex]7(3)=21[/tex]

Last term:

[tex]7(15)=105[/tex]

Sum:

[tex]7\cdot3+7\cdot4+7\cdot5+7\cdot6+7\cdot7+7\cdot8+\cdot79+7\cdot10+7\cdot11+7\cdot12+7\cdot13+7\cdot14+7\cdot15[/tex][tex]21+28+35+42+49+56+63+70+77+84+91+98+105[/tex][tex]819[/tex]

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