Question

Ap = 17,14,11 ..(-40).

Answer 1

Solution :

a = 17

d = 14 - 17 = -3

tn = a + (n-1) d

-40 = 17 + (n-1) (-3)

-40 = 17 - 3n + 3

3n = 40 + 17 + 3

3n = 60

n = 20

So 20th term  of the given AP has term ( -40 )

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Answer 2

08,05,02,0,0,-1,-4,-7,-10,-13,-16,-19,-22,-25,-28,-31,-34,-37,-