a= -1 & d=1/4 find the value of T3 of an AP
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Answer:
T3 = -1/2
Solution:
given a = -1, d = 1/4 of an AP, n = 3
to find T3
Tn = a + (n - 1)d
=> Tn = -1 + (3 - 1) * 1/4
=> -1 + 2*1/4
=> -1 + 1/2
=> -1/2
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