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View Full Version : What is meant by "cubed"?


pheil1952
May 25, 2009, 11:07 AM
What is meant by cube? like as 2 4 cubed? An example shows that it = 16 how did they work that? What is cubed?
Thank you, PH:confused:

Perito
May 25, 2009, 11:12 AM
I'm thinking that something is wrong because two cubed is not equal to 16: 2^3 \ne 16

Squared is a number to the second power: 2^2=4

Cubed is a number to the third power: 2^3=8

Additional powers are usually said to be "to the nth power". For example,

2^4=16

because

2\times 2\times 2\times2= 16

2 \times 2 = 4\, and \, 4\times2 = 8\,and\,8 \times 2 = 16

pheil1952
May 25, 2009, 11:31 AM
I'm thinking that something is wrong because two cubed is not equal to 16: 2^3 \ne 16

Squared is a number to the second power: 2^2=4

Cubed is a number to the third power: 2^3=8

Additional powers are usually said to be "to the nth power". For example,

2^4=16

because

2\times 2\times 2\times2= 16

2 \times 2 = 4\, and \, 4\times2 = 8\,and\,8 \times 2 = 16


Thank you this really helps, I know you are right :-)
PH