1. the function is increasing at (-2,0)U(o,2) because all the out puts are Positive!
(&= infinity... hahah couldn't find the symbol)
The funcion is decreasing at (-&, -2)U(2,&) because all the outputs are negative!
i can tell because i use the ARROW test . if the arrow is going up to get to the output its positive, if the arrow is going down to its utput its negative
2. the etremas are at x=-2,0,2 because at those points at output is zero. since the derivative is the slope then its when there is a change from + to - or the other way around.
3. Using the derivative, the function is concave up at (-&, 1.30)U(0,&). we know this because of the concavity test which said if f '' (x) >0 its concave up (the slope is increasing f '(x))!
its concave down at (-1.30,0)U(1.30,&) because the slope is decreasing.
with the graph i can tell because if it holds water its concave up and if it spills water its convace down
concavity test!
4.i drew it on a paper and it looks like f '(x) = x^4 so i think the function is (x^5)/5 because if you do the chain rule it would bring down the exponent(5) and multiply it with the coefficient of the variable wich is (1/5) and then that would become 1 . then you take the exponent that it had (5) and subtract by 1. your left with x^4.
Saturday, February 13, 2010
Tuesday, January 12, 2010
NOT FUNCTION!
1. Which mindset do you think you are a part of when it comes to "intelligence"? According to the reading, what tells you that you are of this mindset?
I think i have a Fixed Mindset and Growth Mindset. I most times avoid challeges but in other occasions i go for them. Mostly i have a fixed mindset when i am under alot of stress! Like now. I hate being under stress. it makes me NOT function.
2. How has this mindset helped or hurt you in math?
Its hurting me right now. I am under soooo much pressure i cant think. I get some things from calculas but with first responders and US history i cant do anything!.
i need help!
3. What is your reaction to finding out that the brain is just a big muscle that can be trained?
It made me feel stupid because it doesnt take much forme to learn thing. If the brain is just a muscle i can succeed in math but i can't with Stress.
4. How do you see this new piece of information affecting your future?
I will have this in my head and it will beat me down. Knowing that training my brain i can easily succed but it might help.
I think i have a Fixed Mindset and Growth Mindset. I most times avoid challeges but in other occasions i go for them. Mostly i have a fixed mindset when i am under alot of stress! Like now. I hate being under stress. it makes me NOT function.
2. How has this mindset helped or hurt you in math?
Its hurting me right now. I am under soooo much pressure i cant think. I get some things from calculas but with first responders and US history i cant do anything!.
i need help!
3. What is your reaction to finding out that the brain is just a big muscle that can be trained?
It made me feel stupid because it doesnt take much forme to learn thing. If the brain is just a muscle i can succeed in math but i can't with Stress.
4. How do you see this new piece of information affecting your future?
I will have this in my head and it will beat me down. Knowing that training my brain i can easily succed but it might help.
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