Q.3 (i) For any integer a, what is (-1) × a equal to?
(ii) Determine the integer whose product with (-1) is 0.
(a) -22
(b) 37
(c) 0

(i) (-1) × a = -a
(ii) (a) (-1) ×( -22) = (-) × (-) × 1× 22= 22
(b) (-1)× 37= -37
(c) (-1) × 0 = 0 [\(\therefore \)a × 0 = 0]
Hence (c) 0 is the required integer.