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DaveC426913
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It's now been 2 decades since I studied functions and calculaus in high school. I'm sure 75% of it will come back to me fairly quickly, but it seems to be written in a way that makes no sense to me.
This is what I'm studying:
http://ocw.mit.edu/ans7870/resources/Strang/Edited/Calculus/1.pdf
I'm in the exercises portion on p.7. My answers are bolded
1.1 Exercises
Starting from f(0) = 0 at constant velocity v, the distance function is f (t)= v.t .
When f (t) = 55t the velocity is v = v .
When f(t) = 55t + 1000 the velocity is still v
and the starting value is f (0)= 1000 .
In each case v is the slope of the graph of f.
When v is negative, the graphof f(t) goes downward.
In that case area in the t.-graph counts as absolute value (?).
Forward motion from f (0)= 0 to f (2)= 10 has v = 5 .
Then backward motion to f (4)= 0 has v = ? .
Did I get them right? I'm not sure about the second last one.
What is really confusing me is that this doesn't seem to be the way I learned it in H.S. The answers were very difficult for me to get. We always started with the formulae. I don't see any formula above - though I guess I've gotten the answers so far. But on that last one, how am I supposed to know what f(4) is if I don't even know what the formula is?
This is not grokking.
This is what I'm studying:
http://ocw.mit.edu/ans7870/resources/Strang/Edited/Calculus/1.pdf
I'm in the exercises portion on p.7. My answers are bolded
1.1 Exercises
Starting from f(0) = 0 at constant velocity v, the distance function is f (t)= v.t .
When f (t) = 55t the velocity is v = v .
When f(t) = 55t + 1000 the velocity is still v
and the starting value is f (0)= 1000 .
In each case v is the slope of the graph of f.
When v is negative, the graphof f(t) goes downward.
In that case area in the t.-graph counts as absolute value (?).
Forward motion from f (0)= 0 to f (2)= 10 has v = 5 .
Then backward motion to f (4)= 0 has v = ? .
Did I get them right? I'm not sure about the second last one.
What is really confusing me is that this doesn't seem to be the way I learned it in H.S. The answers were very difficult for me to get. We always started with the formulae. I don't see any formula above - though I guess I've gotten the answers so far. But on that last one, how am I supposed to know what f(4) is if I don't even know what the formula is?
This is not grokking.
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