in fix times the sixth term of an A.P. is equal to nine times the ninth term,then show that its 15th term is zero
Answers
Answered by
3
May this will help you
Attachments:
arnav17octy:
why u multiplied a +5d with 6?
because it is given in the question
thanks
6 × Six times of sixth term.... = 6 × a6.....= 6×(a + 5d)
ur most welcome
Answered by
0
6(a6)=9(a9)
6(a+5d)=9(a+8d)
6a+30d=9a+72d
-9a+6a=72d-30d
-3a=42d
-3a-42d=0 (divide by 3)
A+14d=0
I.e.,a15=0
HOPE MY ANSWER IS CORRECT FRIEND!!!!!
6(a+5d)=9(a+8d)
6a+30d=9a+72d
-9a+6a=72d-30d
-3a=42d
-3a-42d=0 (divide by 3)
A+14d=0
I.e.,a15=0
HOPE MY ANSWER IS CORRECT FRIEND!!!!!
Is this help full!!
thanks
Similar questions