The expression 3 × n can be written without the multiplication sign as 3n. For each expression in parts (a)–(c), Use n = 1, 2, 3
, . . ., 10 to evaluate the expression. Describe the set of ten numbers. Suppose the sequence continues for values of n greater than 10. Do the numbers 12, 21, 30, or 210 appear in the sequence?