Math, asked by lavatem78, 11 months ago

If a=5, t10= 20, n= 10 then S10=... *​

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Answered by Meezbro
0

Step-by-step explanation:

The answer is in the pic

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Answered by Anonymous
3

Sn \:  =   \frac{n}{2} {2a + (n - 1)d} \\  \\Sn =  \frac{10}{2}  {2 \times 5 + (10 - 1)20} \\  \\  = 5 \: (10 + 9 \times 20) \\  \\ 5(10 + 180) \\  \\ 5 \times 190 \\  \\ </p><p></p><p> S10=950

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