Question

a18-a17=8 find common difference

Answer 1

Your Answer:

Given:-

$a_{18}-a_{17}=8$

To find:-

Common Difference (d)

Solution:-

$a_{18} - a_{17} = 8 \\ \\ => a +17d - (a+16d) =8 \\ \\ => a + 17d - a -16d =8 \\ \\ => d = 8$

Extra Information:

The above question is of the Chapter " Arithmetic Progression" where a stands for the first term, d stands for common difference, an or l stands for last term.

Sn stands for sum of numbers, t also stands for first term.