CBSE Class 10 Answered
the first and the last term of an AP are -4 and 146 and the sum of Ap 7171. find the number of terms in AP and common diference
Asked by mbrasali73 | 26 Jun, 2019, 19:05: PM
Expert Answer
a = -4, l = 146, Sn = 7171,
Sn = 7171
n/2 (a + l) = 7171
n/2 (-4 + 146) = 7171
n = 101
According to the question,
a101 = 146
a + 100d = 146
-4 + 100d = 146
100d = 500
d = 5
Answered by Sneha shidid | 27 Jun, 2019, 09:38: AM
Application Videos
Concept Videos
CBSE 10 - Maths
Asked by lp9128437598 | 10 Jun, 2024, 10:34: AM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by deepikaselvam2009 | 20 Feb, 2024, 20:57: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by keshavsinghalhapur | 16 Jan, 2024, 20:46: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by keshavsinghalhapur | 15 Jan, 2024, 10:56: AM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by skandachiranjeevin | 06 Dec, 2023, 19:08: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by prassanna.j | 13 Nov, 2023, 23:24: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by latayadav23 | 17 Oct, 2023, 20:39: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by ananya_monica | 28 Sep, 2023, 19:07: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by simmysingh1aug | 20 Sep, 2023, 22:20: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by bkhaiwangkonyak | 07 Mar, 2023, 16:35: PM
ANSWERED BY EXPERT