Request a call back

Ap gp
Asked by Subhamjha0834 | 13 May, 2019, 08:05: PM
Since it is given that the first three numbers forms an A.P.

Let the these three numbers be a - d, a , a + d.

a - d + a + d = 2   ... given
→ a = 1

Since it is given that the last three numbers forms an G.P.

Let the these three numbers be a, ar  and ar2 .

a + ar2 = 26  ... given
→a (1 + r2) = 26
r2 = 25
→ r = ± 5
The numbers are a - d , a , a + d = ar , ar2.

a + d = ar
→ 1 + d = 1 × ±5
→ d = 4 or d = -6

When a= 1 and d = 4 and r = 5 then the numbers will be  -3, 1, 5, 25
and when a= 1 and d = -6 and r = -5 then the numbers will be  7, 1, -5, 25

Answered by Yasmeen Khan | 14 May, 2019, 10:18: AM

## Concept Videos

ICSE 10 - Maths
Asked by shethdhanesh | 02 Oct, 2023, 12:34: PM
ICSE 10 - Maths
Asked by raip93283 | 06 Aug, 2021, 09:55: AM
ICSE 10 - Maths
Asked by rdk_kulkarni | 07 Sep, 2020, 05:11: PM
ICSE 10 - Maths
Asked by suneelmsc | 25 Apr, 2020, 09:34: PM
ICSE 10 - Maths
Asked by Subhamjha0834 | 13 May, 2019, 08:05: PM