SOLUTION: 3,7,17,39,85,?

Question 842485: 3,7,17,39,85,?
Answer by TheInstructor(29) (Show Source): You can put this solution on YOUR website!
Hi,
Firstly this is not sequences and series, simply asking you to find the next number.
Attempt to find the difference betweeen the numbers
7 -3 = 4
17-7 = 10
39-17 = 22
85-39 = 46
Calculate the differences between: 10-4 = 6 , 22-10 = 12 , 46- 22 = 24 (Notice the pattern!!!!)
Therefore since the difference is being multiplied by 2, your next number's difference will be 48
So 85+ 48 = 133
RELATED QUESTIONS
Find the range, standard deviation, and variance for the following sample data: 81, 84,... (answered by reviewermath)

3/4x + 7/8x =... (answered by Fombitz)

solve 3[-7-(-11-85)]= (answered by rfer)

Based on the data shown below, calculate the regression line (each value to two decimal... (answered by ikleyn,MathLover1)

Solve for 7-3(8t-10)=... (answered by checkley77)

(3/7)* 2 + (14/17)*17 = (answered by CubeyThePenguin)

-7 |x+12| +3 >17 (answered by SylvieCarroll)

17+(6�3)-(21�7) (answered by tommyt3rd)

Evaulate (-3) second power -17 A) 39 B) 24 C) 27... (answered by fractalier)