Question

An arithmetic sequence has a 11th term of -2 and 17th term of 7. Find the common difference?

Answer 1

`3/2`

Explanation:

Let,the `1` st term of the A.S is `a` and common difference is `d`,

So, Using the formula, `t_n = a+(n-1)d` we get,

`-2=a+(11-1)d` ....1

and, `7=a+(17-1)d`...2

Solving 1 and 2 we get, `d=3/2`