If the 10th term of an AP is 15 and the 15th term is 10,find the series.
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a10=a+9d =15
a15=a+14d=10
- - -
-5d=5
d=-1
a+9*-1=15
a-9=15
a=24
a+d=24-1=23
a+2d=24+2*-1=24-2=22
a+3d=24-3=21
AP: 24,23,22,21,20.........
a15=a+14d=10
- - -
-5d=5
d=-1
a+9*-1=15
a-9=15
a=24
a+d=24-1=23
a+2d=24+2*-1=24-2=22
a+3d=24-3=21
AP: 24,23,22,21,20.........
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