Question

in an A. p the first and 3rd terms are 5 and 13 respectively. what is it's common difference​

Answer 1

common difference is 4

Answer 2

Step-by-step explanation:

a= 5

a3= 13

let second term be x

x-a= a3-x

x-5= 13-x

2x= 18

x= 9

d= x-a

d= 9-5

d=4

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