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Today,
11:22 AM
mmm4444bot
replied to a thread
Slang Crypt Too?
in
Math Odds & Ends
And, no, the answer is not MR COHEN :lol:
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1 replies | 7 view(s)
Today,
11:19 AM
Roger.Robert
started a thread
Inequality 2
in
Intermediate/Advanced Algebra
For a and b positive integers , show that a+b \leq 2ab
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0 replies | 4 view(s)
Today,
11:18 AM
mmm4444bot
replied to a thread
Reading crypt
in
Math Odds & Ends
Oh for pete's sake. I started with the Doctor's 5-letter word and dropped the w on the floor at the same time. Double-arrgh!
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3 replies | 17 view(s)
Today,
11:10 AM
mmm4444bot
replied to a thread
Inequality
in
Intermediate/Advanced Algebra
Actually, a and b are not just "any value". The given inequality is not true, if either a or b is zero or negative. The point is not to prove...
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6 replies | 30 view(s)
Today,
10:48 AM
Dr.Peterson
replied to a thread
Reading crypt
in
Math Odds & Ends
You meant this, right? = - + - + - = + = - + - + - = + = - + - + - = + = - + - + - = - + - + - = + = - + - + - = + = - + - + - = + = - + - + - =...
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3 replies | 17 view(s)
Today,
10:37 AM
Roger.Robert
replied to a thread
Inequality
in
Intermediate/Advanced Algebra
Isn't this a trivial proof as (a-b)^{2} \geq 0 is true for any value of a or b?
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6 replies | 30 view(s)
Today,
10:37 AM
Dr.Peterson
replied to a thread
[equations involving radicals]
in
Intermediate/Advanced Algebra
What you've done so far is standard and correct (except for one sign error, if I'm right); it just left you at a point where (apart from factoring...
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1 replies | 10 view(s)
Today,
10:36 AM
mmm4444bot
started a thread
Slang Crypt Too?
in
Math Odds & Ends
Catch primary embezzler after taxi money (7)
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1 replies | 7 view(s)
Today,
10:31 AM
MarkFL
replied to a thread
did I sold this correctly?
in
Intermediate/Advanced Algebra
We are given so solve: \displaystyle \left(x^2-5x+5\right)^3=1 We could arrange this as a difference of cubes: \displaystyle...
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10 replies | 133 view(s)
Today,
10:25 AM
Roger.Robert
replied to a thread
Inequality
in
Intermediate/Advanced Algebra
Thanks, I solved it.
see more
6 replies | 30 view(s)
Today,
10:15 AM
mmm4444bot
replied to a thread
Inequality
in
Intermediate/Advanced Algebra
Heh. Didn't realize my proof was synthetic. Continuing from where Roger.Robert left off, I set the inequality to zero and factored the left-hand...
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6 replies | 30 view(s)
Today,
10:07 AM
HallsofIvy
replied to a thread
Inequality
in
Intermediate/Advanced Algebra
Of course, you can't, strictly speaking, prove a statement by assuming it is true! What you can do is start from the (a- b)^2= a^2- 2ab+...
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6 replies | 30 view(s)
Today,
09:58 AM
mmm4444bot
replied to a thread
Reading crypt
in
Math Odds & Ends
That took 25 minutes, 'cuz I didn't cheat. (I was about to.) Clever. :) How did you discover that? = - + - + - = + = - + - + - = + = - + - + -...
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3 replies | 17 view(s)
Today,
09:43 AM
mmm4444bot
replied to a thread
Inequality
in
Intermediate/Advanced Algebra
Multiply each side by ab. Does that give you any ideas?
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6 replies | 30 view(s)
Today,
09:15 AM
Roger.Robert
started a thread
Inequality
in
Intermediate/Advanced Algebra
Prove for every two positive integers a and b that (a+b)(\frac{1}{a}+\frac{1}{b}) \geq 4 By multiplying I obtained : \frac{a^{2}+b^{2}}{ab} \geq 2...
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6 replies | 30 view(s)
Today,
08:59 AM
mmm4444bot
started a thread
Slang Crypt?
in
Math Odds & Ends
Golfed second half carrying nine in the bag (5)
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0 replies | 10 view(s)
Today,
08:56 AM
mmm4444bot
replied to a thread
Cut up Crypt?
in
Math Odds & Ends
Help me out here, bud. What specifically puzzles you? Is it the space between own and s?
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11 replies | 151 view(s)
Today,
08:45 AM
Denis
started a thread
Leading crypt
in
Math Odds & Ends
Country leader talks of real money (7)
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0 replies | 8 view(s)
Today,
08:42 AM
Denis
started a thread
Reading crypt
in
Math Odds & Ends
Playful monkeys write newspaper (3,4,5) 2 e's
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3 replies | 17 view(s)
Today,
08:40 AM
mxrie
started a thread
[equations involving radicals]
in
Intermediate/Advanced Algebra
Hello again! I'm back with another problem from our prerequisite math class and as the title suggests, it's a problem with radicals and we have to...
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1 replies | 10 view(s)
Today,
08:32 AM
Denis
replied to a thread
Cut up Crypt?
in
Math Odds & Ends
Never seen a crypt like that one... Legal? I don't know.
see more
11 replies | 151 view(s)
Today,
04:16 AM
mmm4444bot
replied to a thread
did I sold this correctly?
in
Intermediate/Advanced Algebra
Back to this question, the pair of Real solutions for (x^2 - 5x + 5)^3 = n look like this: x = \dfrac{5}{2} \pm \dfrac{1}{2} \cdot \sqrt{5 +...
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10 replies | 133 view(s)
Today,
03:59 AM
mmm4444bot
replied to a thread
did I sold this correctly?
in
Intermediate/Advanced Algebra
Now you know there are, but you can ignore the four solutions having an imaginary component because you're interested only in the two that don't...
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10 replies | 133 view(s)
Today,
03:41 AM
mmm4444bot
replied to a thread
p(x)y^n + q(x)y^w = c
in
Differential Equations
We don't know, yet, but it's certainly possible that y is also a function of x. Yes, definitely. Each of them represents a factor (number)...
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2 replies | 55 view(s)
Yesterday,
11:33 PM
Dr.Peterson
replied to a thread
did I sold this correctly?
in
Intermediate/Advanced Algebra
What is the topic of the chapter? What is the name of the book? Was there any heading to the group of exercises this was in -- challenge problems?...
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10 replies | 133 view(s)
Yesterday,
11:28 PM
Dr.Peterson
replied to a thread
p(x)y^n + q(x)y^w = c
in
Differential Equations
Well, no, you can't just see that you are supposed to solve for y; All you have shown is an equation, which could be used in many different ways....
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2 replies | 55 view(s)
Yesterday,
10:33 PM
allegansveritatem
replied to a thread
did I sold this correctly?
in
Intermediate/Advanced Algebra
I guess there could be more than two, but that is what I got and it is also what the key at the back of my text book gives as the correct solution...
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10 replies | 133 view(s)
Yesterday,
10:23 PM
allegansveritatem
replied to a thread
did I sold this correctly?
in
Intermediate/Advanced Algebra
No, there was no introduction to this type of problem in the text. I looked high and low in the chapter and could not find. I guess the...
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10 replies | 133 view(s)
Yesterday,
10:11 PM
Vol
started a thread
p(x)y^n + q(x)y^w = c
in
Differential Equations
I am really confused. What does this mean: p(x)y^n + q(x)y^w = c ? I can see you are supposed to solve for y. What I don't get is isn't y =...
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2 replies | 55 view(s)
Yesterday,
09:45 PM
JeffM
replied to a thread
did I sold this correctly?
in
Intermediate/Advanced Algebra
Your intuition that \alpha \in \mathbb R \text { and } \alpha^3 = 1 \implies \alpha = 1 can be proved true formally, so good job. Please note,...
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10 replies | 133 view(s)
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