Find the sum of the first 30 terms of the sequence below. an=4n+1

 The sum of first 30 terms of the given sequence is 1890.

Step-by-step explanation:  We are given to find the sum of first 30 terms of the following sequence :

The first few terms of the above sequence are

So, the given sequence is an arithmetic one with first term 5 and common difference

d = 9 - 5 = 13 - 9 = 17 - 13 =  .  .  .  = 4.

Therefore, the sum of first 30 terms will be

Thus, the sum of first 30 terms of the given sequence is 1890.

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.