Math, asked by rahmat988, 9 months ago

A.p 5,9,13,17,.........ka kon pad 81 hai

Answers

Answered by sreenivas2078

1

Answer:

Step-by-step explanation:I don't know

Answered by servjeetkaur5

2

Step-by-step explanation:

an= a+(n-1)d

81= 5+(n-1)4

76=4n-4

n=72/4

n=18

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