Question

check whether 54 is term of 3,9,15......​

Answer 1

Answer:

Here A = 3 , d = 9-3 = 6 , n =?

we have to check it whether 54 is an term of an AP or not

we use formula an = a + (n-1)d

Now your solution mate ✌✌

54 = 3 + ( n -1 ) 6

54 = 3 + 6n - 6

54 - 3 = 6n - 6

51 + 6 = 6n

n = 57 / 6

so from here we note that 54 is not an term of AP

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