Question

1) Write a recursive definition for the sequence 8,6,4,2
a. a1=8;an=an-1-2
b. a1=2;an=an-1+6
c. a1=8;an=an-1+2
d. a1=2;an=an1-1+8

2) Write an explicit definition for the sequence -4,1,6,11
a. an=-4=5(n+1)
b. an=-4+5(n-1)
c. an=-4+9(n-1)
d. an=-4 +5n

3) Suppose you drop a tennis ball down a height of 6 feet. After the ball hits the floor, it rebounds to 80% of its previous height, how high will the ball rebound after its third bounce? Round to the nearest tenth.
a. 4.8 feet
b. 3.8 feet
c. 1 feet
d. 3.1 feet