To obtain the sequence 1, 1/3, 1/9, 1/ what domain should be applied to the exponential function shown here? a) (0, ∞) b) [0, ∞) c) {1, 2, 3, } d) {0, 1, 2, 3, }

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.