Question

the first term of an arithmetic sequence is 10 and the third term is 24 .what is it's common differences ​

Answer 1

Answer: d = 7

Step-by-step explanation:

a1 = 10

a3=24

a2= ?

so

(a1+a3)/2

(10+24)/2

34/2= 17

thus a2=17

now d= a2-a1= a3-a2

 17-10=24-17

7=7

thus d= 7

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