Let f={(1, -1), (4, -2), (9, -3), (16, 4)} and g={(-1,-2), (-2,-4), (-3, -6), (4, 8)}. Show that gof is defined while fog is not defined. Also find gof.
Mixed-up sentence exercise
Put the parts in order to form a sentence. When you think your answer is correct, click on "Check" to check your answer. If you get stuck, click on "Hint" to find out the next correct part.