Question

Find the 25th term of the AP -5, -5/2,0,5/2,.....

Answer 1

a=-5
d=5/2
25th term = a + 24d
= -5 + 24×5/2
= 55
thus the 25th term is 55

Answer 2

d =5/2 ,a= -5
25th term = a +24 d
=-5 +24 (-5/2 )
= -5 + 12 ( 5 )
= -5 +60
= 55
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