please give this answer wrong answer will be reported
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Answered by
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
0
Answer:
3648
Explanation:
please mark my answer as brainlist
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