Question

Which terms of the a.p 1,4,7,...is 55?

Answer 1

Hey!!
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✨Arithmetic Progressions ✨
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Given AP :

1 , 4 , 7 .................

Here , first term A = 1

Common Difference d = 3

An = 55

Using the formula ,

An = A + ( N - 1 ) 3

55 = 1 + ( N- 1 ) 3

55 - 1 = 3 ( N - 1 )

54 / 3 = ( N - 1 )


N- 1 = 18

N = 19



✔It's the 19th. Term



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