find the sum of :AP 34 + 32 + 30 + ..........+ 10
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AP : 34 + 32 + 30......+10
First term (a): 34
Last term (l): 10
l = a + (n-1)d
10 = 34 + (n-1) (-2)
Total no. Of terms n = 13
Sum = n(a+l)/2
=13(34+10)/2
=286
First term (a): 34
Last term (l): 10
l = a + (n-1)d
10 = 34 + (n-1) (-2)
Total no. Of terms n = 13
Sum = n(a+l)/2
=13(34+10)/2
=286
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