1.

1) In an A.P if S10 = 35 and S9 = 28 find a10

Answer»

We KNOW that

\fbox\blue{An = Sn - Sn-1}

So,

\pink{A10 = S10 - S9}

\pink{A10 = 35 - 28}

\pink{A10 = 7}



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