Math, asked by aayushgond2020, 7 months ago

5) In an A.P., if a= 7, d= 3, an=28, then the value of n is.......
a) -8
b) 10
c) 8
d) 21

Answers

Answered by SAINIVESH

1

Answer:

-8

Step-by-step explanation:

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Answered by anni2005

1

Answer:

8

Step-by-step explanation:

an=a+(n-1) x d

28 =7+(n-1) x 3

28-7=3n-3

21=3n-3

21+3=3n

24=3n

n=24/3

n=8

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