Math, asked by jasijaskm2304, 9 months ago

If in a AP a=1,tn=20 and sn=399 then n is

Answers

Answered by abhishekkanoongooffi

1

Step-by-step explanation:

this question is from sequence and series chapter of class 10th NCERT simply put the formula on this equation

Answered by adeeladilu2

2

ur answer is attached above....

stay safe ND have a nice day.....

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