Question

What is the sum of the first 20 natural numbers

b) Find the sum of the first 20 terms of the AS 4,8,12,...........

c) If 3 is added to each term in the above sequence write down the new

sequence

d) Find the sum of the first 20 term of the new sequence

2)

a) Find the sum of the first 25 terms of the arithmetic sequence

6,10,14,............

b) Find the sum of the first 25 terms of the arithmetic sequence

15,19,23.............

3) Find the sum of the first 30 terms of the arithmetic sequence

3,10,17,..............

4) Find the sum of the first 50 terms of the arithmetic sequence 4,10,16,.........

5) Find the sum of the first 100 terms of the arithmetic sequence 10,16,22,.............​

Answer 1

Answer:

natural numbers are those which we count naturally like

1 2 3 4....