Asked by anonymous

the first number of a sequence is 200. every number of the sequence after the first is 100 less than twice the preceding number. what is the 5th number of the sequence
Answered by Reiny
t1 = 200
t2 = 2t1 -100 = 2(200) - 100 = 300
t3 = 2t2 - 100 = 2(300) - 100 = 500
t4 = ...
..
t6 = 2t5 - 100 = ...

(you should get 3300)
Answered by Reiny
oops, went too far, only had to go to t5

how about 1700 ?