Math, asked by sritextile2111, 11 months ago

In an ap an=20 and sn=399 find sn-1

Answers

Answered by sunny8270

1

Answer:

398

Step-by-step explanation:

Given, an=20,Sn=399 sn-1=398

Answered by adeeladilu2

2

ur answer is attached above....

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

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