CBSE Class 10 Answered
3)If 9th term of an AP is zero, prove that 29th term is double the 19th term.
Asked by | 24 Dec, 2009, 09:18: AM
Expert Answer
an = a1 + (n-1)d
a9 = a1 + 8d = 0; a1 = -8d
a29 = a1 + 28d = -8s + 28d = 20d...(1)
a19 = a1 + 18d = 10d .....(2)
Hence a29 = 2a19
Regards,
Team,
TopperLearning.
Answered by | 24 Dec, 2009, 01:45: PM
CBSE 10 - Maths
Asked by hanugraha | 30 May, 2010, 07:53: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by hanugraha | 30 May, 2010, 07:13: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 29 May, 2010, 04:59: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by ROJAAPPA | 29 May, 2010, 12:58: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 29 May, 2010, 10:52: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by devanshmudgal | 28 May, 2010, 07:31: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 28 May, 2010, 01:12: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 28 May, 2010, 01:08: PM
ANSWERED BY EXPERT
