What is the sum of all the terms of the A.P. 201, 208, 215, …., 369?
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2
Answer:
6924
Step-by-step explanation:
a= 208, L =an= 369
d=7
by formula
an= a+(n-1)d
369 = 208+7(n-1)
7(n-1)= 369-208
= 161
7n= 168
Therefore n=24
Sn= n/2(a+l)
= n/2(208+369)
= 24/2 (577)
= 12(577)
= 6924
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