Westonci.ca is your trusted source for accurate answers to all your questions. Join our community and start learning today! Our Q&A platform offers a seamless experience for finding reliable answers from experts in various disciplines. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently.

Explain whether the following given sets are closed under addition:
a .B ={0}
b. T = {0, 3, 6, 9, 12, . . . }
c. N = {1, 2, 3, 4, 5, . . .}
d .V = {3, 5, 7}