Question

if three consecutive terms of AP are 4 by 5 ,a and 2 then find the value of a

Answer 1

if 3 terms a,b,c are in AP then 2b=a+c

so,2a=4\5+2

    2a=2.8

    a=1.4

Answer 2

Since 4/5, a, 2 are in Arithmetic Progression.

—-> a - 4/5 = 2 - a (Common differences are equal)

—-> 2a = 2 + 4/5

—-> 2a = 14/5

—-> a = 7/5

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