find 25th term of ap -5,-5/2,0,5/2....
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here d=-5/2-(-5)=5/2
a=-5
tn=a+(n-1)d
t25=-5+(25-1)5/2
=-5+24×5/2
=55
a=-5
tn=a+(n-1)d
t25=-5+(25-1)5/2
=-5+24×5/2
=55
kartik2706:
how the answer comes 55
-5+24×5/2=-5+12×5=-5+60=55
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