5, (2k -9), 9 is an ap
d = (2k -9) - 5 = 2k-9 - 5 = 2k - 14 .... (i)
also d = 9 - (2k-9) = 9 - 2k - 9 = - 2k ...... (ii)
From (i) and (ii)
2k - 14 = -2k
2k + 2k = 14
4k = 14
k = 14/4 = 7/2

1Thank You

Anshika / U Can Call Me Alien ???? 6 years, 10 months ago

K=5

2Thank You

ANSWER

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