The first term of an A.P. is 1 and the nth term is 20. If Sn=399 then n=?
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Answered by
28
Answer:
The value of n term is 38
Step-by-step explanation:
a=1,l=20,Sn=399
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Answered by
19
ur answer is attached above....
.
stay safe ND have a nice day........
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