The problem is to estimate given that , x = 4, and

I have tried this and found that the approximate change in y is dy = 0.03 and the actual change in y is 0.0301, but I am not sure what to do with this information.

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- May 14th 2012, 01:01 PMBashyboyUsing Differentials
The problem is to estimate given that , x = 4, and

I have tried this and found that the approximate change in y is dy = 0.03 and the actual change in y is 0.0301, but I am not sure what to do with this information. - May 14th 2012, 02:19 PMskeeterRe: Using Differentials

at , and

(note that y(4.01) = -3.9699 for reference) - May 14th 2012, 03:49 PMBashyboyRe: Using Differentials
Oh, I see. I wonder why they didn't write or something to that effect; it would have been a little easier for a simpleton like me.

- May 14th 2012, 05:05 PMHallsofIvyRe: Using Differentials
Telling you that "x= 4"

**does**tell you that "y" refers to "y(4)".