Question 2

If the sum of three numbers in A.P., is 24 and their product is 440, find the numbers.

Answer

Let the three numbers in A.P. be *a* – *d*, *a*, and *a* + *d*.

According to the given information,

(*a* – *d*) + (*a*) + (*a* + *d*) = 24 … (1)

⇒ 3*a* = 24

∴ *a* = 8

(*a* – *d*) *a* (*a* + *d*) = 440 … (2)

⇒ (8 – *d*) (8) (8 + *d*) = 440

⇒ (8 – *d*) (8 + *d*) = 55

⇒ 64 – *d*2 = 55

⇒ *d*2 = 64 – 55 = 9

⇒ *d *= ± 3

Therefore, when *d* = 3, the numbers are 5, 8, and 11 and when *d* = –3, the numbers are 11, 8, and 5.

Thus, the three numbers are 5, 8, and 11.

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Find the sum to

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Find the value of

*n*so that may be the geometric mean between*a*and*b*. - Q:-
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If the sum of first p terms of an A.P. is equal to the sum of the first q terms, then find the sum of the first (p + q) terms.

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Name the octants in which the following points lie:

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Asif
2019-12-15 20:19:13

Thnx

Asif
2019-12-15 20:18:38

Thnx

Deekshitha
2019-09-04 18:24:24

Thank you it for solving the problem and helped me

Deekshitha
2019-09-04 18:24:01

Thank you it for solving the problem and helped me

KICCHA balaji
2019-03-12 23:10:08

Tq bro Usefullll

Nikhil
2019-03-04 14:58:14

Thanx

QAMAR
2016-11-17 12:23:41

HOW CAN WE TAKE NUMBER I MEAN ON WHICH BASES

Mabel
2016-01-17 00:57:58

I luv dis.. Its easier and explanatory. Thanks!

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