Question

1. (a) Calculate 1 - 2 + 3 - 4 - 5 - 6 + ..... + 179 - 180.
(b) Find the value of 5 + (- 5) + 5 + (- 5) + 5 + ..... if the number of fives are
(1) 148
(II) 191​

Answer 1

Answer:

8923838399393939209392373738