Question

plz answer this fast 15 th question

Answer 1

HOLA

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nth term = ( An = 3 + 2n)

First term = ( A1 = 3 + 2(1)) = 5

Second term = ( A2 = 3 + 2(2) ) = 7

And , Common difference = (7 - 5) = 2

So , we have , A = 5 , D = 2

$sn \: = \: \frac{n}{2} \: ( \: 2a \: + \: (n \: - 1)d) \\ \\ sn \: = \: \frac{24}{2} \: ( \: 2 \times 5 \: + \: (24 - 1)2) \\ \\ sn \: = 12 \: (10 \: + \: 23(2)) \\ \\ sn \: = \: 12(10 \: + \: 46) \\ \\ sn \: = \: 12(56) \: = \: 672$


So sum of first 24 term is 672


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HOPE U UNDERSTAND

Regards - ❤ Vilokatbest❤