Find the 9th term from the end of the Ap 5,9,13,17.... ,69?
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common difference =4
a=5
Tn=a+(n-1)d
T9=37
a=5
Tn=a+(n-1)d
T9=37
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l=69
d=9-5 =4
therefore 9th term form the end = l-(9-1)d
l-(9-1)d=l-8d
=69-8 x 4
= 69- 33
= 37
d=9-5 =4
therefore 9th term form the end = l-(9-1)d
l-(9-1)d=l-8d
=69-8 x 4
= 69- 33
= 37
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