Question

Find the sum of first 30 multiple of 4

Answer 1

Answer:

the sum of first 30 multiple of 4=1860

Step-by-step explanation:

the sum of first 30 multiple of 4

A.P= 4,8,12,16,..........

30th term =a+(n-1)d

                =4+(30-1)4

                =4+(29×4)

                =4+116

          =120

Sn= n/2(first term +last term)

    =30/2(4+120)

    =15×124

     =1860

the sum of first 30 multiple of 4=1860