Which term of the A.P. 3,8,13… is 248?

Explanation

,
given A.P is
`3,8,13,.....`

first term of this A.P is `a_1`` =3`

second term of this A.P is `a _2`` =8`

common difference of an A.P is given by

(i.e.,`d=a n+1​ −a n`​ )

putting n=1 in above equation

d=`a _2​ `−`a _1​`` =8−3=5`
...