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Arithmetic Progressions

Question 5:

Find the number of terms in each of the following A.P.

I. 7, 13, 19, …, 205

II.

Answer:

I. 7, 13, 19, …, 205

For this A.P.,

a = 7

d = a2a1 = 13 − 7 = 6

Let there are n terms in this A.P.

an = 205

We know that

an = a ...

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