Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 10 Answered

Determine the A.P., whose fifth term is 16 and the difference of the eighth term from the thirteenth term is 20.
Asked by 4321sandeep | 11 Oct, 2020, 11:46: AM
Expert Answer
Question should be:
Determine the A.P., whose fifth term is 19 and the difference of the eighth term from the thirteenth term is 20.
Solution:
Given: a5 = 19 i.e. a + 4d = 19 ... (i)
a13 - a8 = 20 i.e. a + 12d - a - 7d = 20 i.e. 5d = 20 
Therefore, d = 4
Substituting d in (i), we get
a + 4 x 4 = 19
a = 3
Hence, the required AP is 3, 7, 11, 15, 19, 23, 27, 31, ...
 
Note: If a5 = 16, we get a = 0 which contradict the statement a5 = 16
Answered by Renu Varma | 12 Oct, 2020, 10:14: AM

Concept Videos

ICSE 10 - Maths
Asked by dr904265 | 26 Sep, 2022, 09:59: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by srivastavasrishti454 | 13 Sep, 2021, 08:15: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by atanvi2006 | 22 May, 2021, 01:41: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by bhavishgowdabs355 | 30 Apr, 2021, 09:03: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by 4321sandeep | 11 Oct, 2020, 11:46: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by shobhamgowda179 | 15 Sep, 2020, 08:02: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by Www.shazils123 | 10 Jul, 2019, 08:38: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by krcraju1973 | 10 Jun, 2019, 09:43: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by krcraju1973 | 09 Jun, 2019, 05:38: PM
ANSWERED BY EXPERT
Get FREE Sample Mock Papers for Final Exams
Download Now
×