if the 9 term of ap is 0 then prove that is 29th term is duoble the 19th term
scarffxprop4ll5h:
if u r in icse and appearing for icse 2019 examinations , prove that sums r not comimg in AP
Answers
Answered by
2
T9 = 0
=> a +8d = 0
=> a = - 8d
_____________
T29 = a + 28d
T29 = - 8d + 28d
T29 = 20d ------(1)
_____________
T19 = a + 18d
=> T19 = - 8d + 18d
=> T19 = 10d
=> 2 × T19 = 20d ------(2)
On comparing equation 1 and 2, we get
T29 = 2 × T19
=> a +8d = 0
=> a = - 8d
_____________
T29 = a + 28d
T29 = - 8d + 28d
T29 = 20d ------(1)
_____________
T19 = a + 18d
=> T19 = - 8d + 18d
=> T19 = 10d
=> 2 × T19 = 20d ------(2)
On comparing equation 1 and 2, we get
T29 = 2 × T19
Answered by
1
The Answer is Simple ! watch the Image !
Attachments:
Similar questions
English,
7 months ago
English,
7 months ago
Computer Science,
7 months ago
Math,
1 year ago
India Languages,
1 year ago