Question

Tell whether the sequence is arithmetic. If it is, what is the common difference? 10,15,21,28...

Answer 1

no, this is not arithmetic

Answer 2

This is not an arithmetic progression

Explanation:

We have given the sequence 10,15,21,28

This is not an arithmetic sequence because arithmetic sequence is that sequence of terms in which there is common difference between all the terms

`d=a_2-a_1`

d=15-10=5 here,
`a_2=15,a_1=10`

d=21-15=6 here,
`a_2=21,a_1=15`

d=28-21=7 here,
`a_2=28,a_1=21`

Therefore, not an arithmetic progression.