t(1) = 3 = 1x3
t(2) = 8 = 2x4
t(3) = 15 = 3x5
t(4) = 24 = 4x6
t(5) = 35 = 5x7
..
looks like
t(n) = n x (n+2)
so t(11) = 11x13 = 143
The local zoo keeps the track of the number of dragonflies breeding in their insect exhibit each day. day: 1,2,3,4,5 and dragronflies : 3,8,15,24,35
use an equation to determine the number of dragonflies that will be breeding after 11 days.
1 answer