SOLUTION: Write the next two numbers in the following sequence (1).1,8,27,64, ______, ________...... (2).-6561,2187,-729,________, ________,....

Algebra ->  Sequences-and-series -> SOLUTION: Write the next two numbers in the following sequence (1).1,8,27,64, ______, ________...... (2).-6561,2187,-729,________, ________,....       Log On


   



Question 1129666: Write the next two numbers in the following sequence
(1).1,8,27,64, ______, ________......
(2).-6561,2187,-729,________, ________,....


Found 2 solutions by Boreal, Edwin McCravy:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The first is perfect cubes, so it will be 125, 216
The second is -3^8,+3^7,-3^6, so the next two are +3^5 (243) and -3^4 (-81).

Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
(1)
1,8,27,64, ______, ________......
1∙1∙1 = 1
2∙2∙2 = 8
3∙3∙3 = 27
4∙4∙4 = 64
5∙5∙5 = 125
6∙6∙6 = 216

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(2).
-6561,2187,-729,________, ________,....
-6561÷(-3) = 2187
 2187÷(-3) = -729
 -729÷(-3) =  243
  243÷(-3) =   81   

Edwin