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1^3 + 2^3 + 3^3 +4^3 ... n^3 = ? |
2010-01-29 |
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ireimaima pose la question :
Hi..
Can u please help me with this question..
I find that when i test eg: n=2 for n (n+1) /4,
it seems that it does not giving me the right answer of 1^3 + 2^3 = 9
but 3/2... i'm confuse..can u please help me..thanks so much
Prove that:
1^3 + 2^3 + 3^3 +4^3………………………………..n^3 = n (n+1) /4
Penny Nom lui répond. |
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Factoring |
2008-11-19 |
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Neji pose la question :
How do you factor (y-z) (y+z) (y^4+y^2z^2+z^4) and get (y+z)(y^2-yz+z^2) (y-z) (y^2+yz+z^2) as the answer?
Harley Weston lui répond. |
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Sum and difference of cubes |
2008-01-30 |
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Amanda pose la question :
It has been a really long time since I was in Algebra and I can't remember how to factor cubes such as x^3 +81 or subtracting/adding fractions with variables such as [1/(x+h)+2]-[1/x+2]. Please help!!!
Penny Nom lui répond. |
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Factor |
2006-03-08 |
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Brad pose la question :
Factor:
x3 + 64m3 and 125p3 - q6
Penny Nom lui répond. |
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Factoring |
2004-07-19 |
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A student pose la question :
Factor completely:
3x3 - 24y3
54x6 + 16y3
16xy - 4x - 4y - 1
0.09x2 - 0.16y2
Penny Nom lui répond. |
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Factoring |
2004-04-27 |
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Bipin pose la question :
FACTORISE:
a to the power of 6 + b to the power of 6
Penny Nom lui répond. |
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Some factoring problems |
2004-04-15 |
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KJ pose la question :
Factor these:
x3+125 -----> (x+5)3
8x3-27 -----> (?)
x2+36 -----> (x+6)2
x4-5x2+4 --> (?)
Penny Nom lui répond. |
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Factoring |
2002-12-11 |
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Larry pose la question :
Question:
how do u factor trinonmials
EX: X 3 + Y 3
X 3 - 8Y 3
8X 2 - 72
64A 3 - 125B 6
Penny Nom lui répond. |
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Factor completely |
2002-11-21 |
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Shelley pose la question :
these two questions are to be factored completely but i have no idea how to factor them - (x-4y) 2 - 3(x-4y) - 4
- x 6 + y 6
Penny Nom lui répond. |
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24x^4 + 3x |
2002-03-18 |
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gary pose la question :
24x 4 + 3x
Penny Nom lui répond. |
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The sum of the cubes is the square of the sum |
1999-08-25 |
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Bernard Yuen pose la question :
How to prove 13 + 23 + 33 + 43 + ... n3 is equal to (1+2+3+...n)2? (for n is positive integer)
Harley Weston lui répond. |
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Factoring |
1999-03-30 |
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Maggie Stephens pose la question :
I don't know anything about factoring would you plese help me.
3x4 - 48 54x6 + 16y3 125-8x3 12x2 - 36x + 27 9 - 81x2 a3 + b3c3 I would greatly appreciate any help you can give me thanks.
Jack LeSage lui répond. |
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