Question

The 11th term of the A.P. : -5, -5/2, 0, 5/2,..........is *

Answer 1

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a = -5

d = -5/2 - (-5) = 5/2

T11 = a + (11-1)d

=> -5 + (10)(5/2)

=> -5 + 25

=> 20

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