CBSE Class 10 Answered
<div>common difference of an arithmetic progression is 3 and find a20 - a15</div>
Asked by Kapil | 20 Oct, 2017, 09:59: AM
Expert Answer
We know that the common difference is given as '3'.
Let 'd' be the common difference, 'a' be the first term, so the nth term is written as 
We will have to find 
Applying the formula, the above expression becomes,
(a+19d) - (a+14d)
= a + 19d - a - 14d
= 5d
This finally becomes
5 x 3
=15
Answered by | 14 Dec, 2017, 05:13: PM
CBSE 10 - Maths
Asked by samiranroychowdhury942 | 19 Jul, 2022, 08:37: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by madhushreemahesh1986 | 10 Feb, 2022, 05:19: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by mohammeduzaib786 | 27 May, 2021, 04:00: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by poojakanchan | 10 Mar, 2021, 11:38: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by chshandi2005 | 21 Dec, 2020, 11:31: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by ruparupasri77 | 22 Sep, 2020, 12:44: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by priyanka.maz1409 | 11 Mar, 2020, 09:04: AM
ANSWERED BY EXPERT