Question

The sum of first 10 terms of an arithmetic sequence is 350 and the sum of first 5 terms is 100. Write the algebraic expression for the sequence. *

Answer 1

Answer:

1) s(10)=10/2{2a+(n-1)d}

=>350=10/2{2a+(n-1)d}

2). s(5)=5/2{2a+(n-1)d}

=>. 100=5/2{2a+(n-1)d}

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