Which recursive definition could be used to generate the sequence {1, 2, 2, 4, 8, }?
a) a1 = 1, and an = 2(an-1) + 2
b) a1 = 1, and an = 2(an-1) + 2n
c) a1 = 1, a2 = 2, and an = (an-2)(an-1)
d) a1 = 1, a2 = 2, and an = 2(an-2)(an-1)

Sam makes his sales calls according to a pattern. he travels either north or south depending on the calendar. some of his past trips were as follows: on february 17, april 24, june 10, september 19, and november 3 he drove north. on february 28, may 25, august 22, november 20, and december 18, he drove south. describe sams' pattern. in which direction will sam drive on oct4 and oct 24?

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

4+(2+x) can you me solve this problem