If the common difference of an AP is 3, then what is a15 - a9 ?

Question

Yash Baheti · Answer

Hi, If d=3 than A15 will be = a + 14d (a being first term) Similarly A9 will be + a + 8d, S0 A15-A9 will be = 6d OR 18 (as d is 3)

Shivam · Answer

First of all if d=3 and we have to solve this then a15=a+14dAnd a9 =a+8dWe put this equation (a+14d)-(a+8d)=14d-8d=6d(6×3=12)

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If the common difference of an AP is 3, then what is a15 - a9 ?

If the common difference of an AP is 3, then what is a15 - a9 ?

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If the common difference of an AP is 3, then what is a15 - a9 ?

If the common difference of an AP is 3, then what is a15 - a9 ?

2 Answers

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