Question

Find the middle term of
the A.P
2,5,8,.... 152​

Answer 1

a = 2

d = a1 -a2 = 5 - 2 = 3

an = 152

an = a+(n-1)×d

152= 2+(n-1)×3

152-2={n-1)×3

150=(n-1)×3

150/3=(n-1)

50 = n-1

50+1=n

51=n

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