Question

In an AP if d = -4,n=7, nth Term=4,find a.
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Answer 1

Answer:

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Answer 2

Answer:

tn = a + ( n - 1 ) d

4 = a + ( 7- 1 ) -4

4 = a + 6 × -4

4 = a + (-24)

4 = a - 24

4 + 24 = a

a = 28