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Does anyone know how I might be able to graph a sum or product on a graphics calculator?
For instance, I type in
on my TI-89 but it won't appear at all.(Btw was there a calculator forum in the past? I can faintly remember there being one)
Last edited by Toast (2007-01-24 11:26:06)
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I don't have a TI-89, so I wouldn't know the intricacies of that particular calculator, but I would think that the problem might be because the use of the summation sign means that the function is discontinuous.
So if you tried to graph it then you'd get a bunch of points rather than a curve, and your calculator might not like that.
I don't remember there ever being a calculator forum. If there was, I don't see why it would have been closed. Maybe there was a calculator topic in one of the boards at some point.
Why did the vector cross the road?
It wanted to be normal.
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On a Ti-89, what you can do is create an array of points:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
And a second array:
[1, 5, 14......]
And then plot them (go to Y=, and then up above the equations) with the first on the x-axis and the second on the y-axis.
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
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How do you set up an array of points?
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Ah, sorry. It's:
{1, 2, 3}->x
Where "->" is the STO> button.
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
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