Posted by **anonymous** on Wednesday, July 24, 2013 at 3:27pm.

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

- math -
**Reiny**, Wednesday, July 24, 2013 at 5:23pm
t1 = 200

t2 = 2t1 -100 = 2(200) - 100 = 300

t3 = 2t2 - 100 = 2(300) - 100 = 500

t4 = ...

..

t6 = 2t5 - 100 = ...

(you should get 3300)

- math -
**Reiny**, Wednesday, July 24, 2013 at 5:24pm
oops, went too far, only had to go to t5

how about 1700 ?

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