English, asked by hk3538654, 2 months ago

please give this answer wrong answer will be reported ​

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Answered by gogoi18priyabrat
0

Answer:

first term A=21

d= 27 - 21

= 6

Last term An= 207

We know that

An=A+(n-1)d

207=21+(n-1)6

6n=192

n=32

so,sum

Sn=n/2(A+An)

Sn=32/2(21+207)

=16×228

=3648

Answered by vallabhsutariya
0

Answer:

3648

Explanation:

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