Question

which term of 8,13,18 ....is 83​

Answer 1

Let a=3 

d=5, (8-3)=5

an=78

78 = a+(n-1)d

78=3+ (n-1)5

78=3+5n-5

78=-2 +5n

78+2=5n

80=5n

n=80/5

n=16

Answer is 16.....

Answer 2

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