for a A.P T25 -T20=15 then d=
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Answered by
6
(a+24d)-(a+19d)=15
5d=15 then d=3
5d=15 then d=3
Answered by
23
T(25) = a + 24d
T(20) = a + 19d
From above -
a + 24d -(a + 19d) = 15
a + 24 d - a - 19d = 15
5d = 15
d = 15/5 = 3
T(20) = a + 19d
From above -
a + 24d -(a + 19d) = 15
a + 24 d - a - 19d = 15
5d = 15
d = 15/5 = 3
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