Question

the first term of an arithmetic sequence is 1 and the third term is 7,what is the common difference

Answer 1

Answer:

common difference (d) = 3

Step-by-step explanation:

1, 4 , 7

●checking.

1 + 3 = 4

4 + 3 = 7

goodluck:)

Answer 2

Answer:

a=1=t1

t3=a+2d

7=1+2d

2d=7-1

2d=6

d=3

d is difference

answer is 3