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1/(1x2)+1/(2x3)+1/(3x4)...+1/(n(n+1)) |
2008-02-20 |
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From hossun:
Find a formula for 1/(1x2)+1/(2x3)+1/(3x4)...+1/(n(n+1))
by examining the values of this expression for small values of n.
Use mathematical induction to prove your result.
Answered by Stephen La Rocque. |
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A fractional inequality |
2008-02-20 |
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From ed:
solve the inequality
(x+3)^2 (2-x)
___________ < 0
(x+4) (x^2 - 4)
Answered by Penny Nom. |
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Decimal fraction to mixed number |
2008-02-20 |
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From cristian:
write 7.62 as a mixed number
Answered by Penny Nom. |
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Nonagon |
2008-02-20 |
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From Austin:
For the life of me I cannot find an object shaped like a nonagon. Do you know of any examples?
Thanks!
Answered by Stephen La Rocque. |
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18x=6(x*x) |
2008-02-20 |
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From peyton:
18x=6(x*x)
Answered by Stephen La Rocque. |
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Factoring a trinomial |
2008-02-20 |
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From Adrienne:
a field an rea of (x^2+x-6) square metres. State expressions for its length and width.
Answered by Penny Nom. |
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Peg has 12 more cases to unload than Mike |
2008-02-20 |
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From brianda:
Peg has 12 more cases to unload than Mike. They have a total of 150 cases to unload. How my cases does each have to unload?
Answered by Penny Nom. |
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Find the next terms |
2008-02-20 |
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From Darrin:
I was given a number sequence and can't figure out the next terms to this
2,9,20,35,66,91......
Answered by Penny Nom. |
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How many feet deep to make a 2 acre plot? |
2008-02-19 |
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From Bob:
If you have a piece of property that is 265.15 wide, how many feet deep to make a 2 acre plot and how deep to make a 3 acre plot.
Answered by Stephen La Rocque. |
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A step pyramid |
2008-02-19 |
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From Patty:
On a step pyramid - do you count each side of the step as a face?
- and each corner a vertex? - How do I find the volume of a step pyramid?
Answered by Stephen La Rocque. |
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exercice de trigonométrie |
2008-02-19 |
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From Maxime:
Montrer que dans un triangle quelconque le produit des cosinus des angles
cosA*cosB*cosC est inférieur ou égal à 1/8.
Answered by Pierre-Louis Gagnon et Thierry Moisan. |
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Two right triangles |
2008-02-18 |
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From Amy:
Hi, I have a problem that has me stumped.
There are two right triangles that share the same adjacent side (AB) which
is 240'. The right angles of each triangle are at the opposite ends of the
shared side.
The Opposite side (AC) of Triangle ABC is 180'
and the Hypotenuse (CB) is 300'.
The Opposite side (BD) of Triangle ABD is 100'
and the Hypotenuse (AD) is 260'.
How do I figure out where the hypotenuses intersect?
Answered by Stephen La Rocque and Harley Weston. |
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A complex quadratic |
2008-02-18 |
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From Ash:
z^2-(6+2i)z+(8+6i)=0
Solve for Z
Answered by Steve La Rocque and Penny Nom. |
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How much does water weigh per gallon? |
2008-02-18 |
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From sofie:
how much does water weigh per gallon
Answered by Penny Nom. |
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The area of a right triangle |
2008-02-18 |
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From ASHLEY:
WHAT IS THE AREA OF A RIGHT TRIANGLE? WITH THE SHORT SIDE
BEING 16 AND THE HYPOTENUSE 20?
Answered by Penny Nom. |
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