Sigma Notation Exercise

1. Evaluate the following sums:

2. Write the following sums in sigma notation:

a. 2 + 3 + 4 + 5 + 6 + 7

b. t3 + t4 + t5 + t6

c. 4 + 9 + 16 + 25

d. 3 + 5 + 7 + 9 + 11 + 13

e. -3 + 6 − 9 + 12 − 15 + 18 − 21

f.  5 + 10 + 17 + ... + 145