Question

a1= 2; a3=26 find a2
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Answer 1

Answer:

14

Step-by-step explanation:

let A2 be x. a1=2 a3=26

d1=a2-a1=x-2

d2=a3-a2=26-x

d1=d2

x-2=26-x

x+x=26-2

2x=28

x=28/2

:.x=14