Question

Compute the following sums
a) 1 + 2 + 3 +... + 40
b) 2 + 4 + 6 +... + 60
c) 3 + 5 + 7 + 17 +.... 81
d) 6 + 11 + 16 + 17 +...+ 201​

Answer 1

Answer:

a . 820

Step-by-step explanation:

can't solve the others sorry .

Answer 2

Answer:

1. 4
2. 8
3. 31
4. 27

Step-by-step explanation:

a) 1 + 2 + 3 +4 + 40

+ 40 b) 2 + 4 + 6 +8+ 60

+ 60 c) 3 + 5 + 7 + 17 +31+81

81 d) 6 + 11 + 16 + 17 +27+ 201