Answers

2016-03-13T12:26:28+05:30
Reversing the order- AP = 201,..........9,7,5,3
a = 201,
d= -2,( 3-5 = -2)
n=15(15th term)
a15 = a + 14d
       = 201 + 14(-2)
       =173


           
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can also usee an = a + n-1d formula,braniest ans