Use the table of values of f(x, y) to estimate the values of fx(3, 2), fx(3, 2.2), and fxy(3, 2). \begin{array}{|c|c|}\hline y & 1.8 & 2.0 & 2.2 \\ \hline x & & & \\ \hline 2.5 & 12.5 & 10.2 & 9.3 \\ \hline 3.0 & 18.1 & 17.5 & 15.9 \\ \hline 3.5 & 20.0 & 22.4 & 26.1 \\ \hline \end{array}

chillywilly12a

chillywilly12a

Answered question

2021-06-09

Use the table of values of f(x,y) to estimate the values of fx(3,2), fx(3,2.2), and fxy(3,2).
y1.82.02.2x2.512.510.29.33.018.117.515.93.520.022.426.1

Answer & Explanation

au4gsf

au4gsf

Skilled2021-06-10Added 95 answers

Step 1
fx(3.2)=(f(3.5, 2)f(2.5, 5))(3.52.5)
=(22.410.2)1.0
=12.21.0
=12.2
fx(3, 2.2)=(f(3.5, 2.2)f(2.5, 2.2))(3.52.5)
=26.19.3)1=16.8
For fxy(3,2), we have choices. If we don't care about centering the y, we can use the results already gathered here.
Then, fxy(3.2)=(fx(3, 2.2)fx(3.2))(2.22)
=(16.812.2)2=23
If we had wanted to center it, we could have used
(f(3.5, 2.2)f(3.5, 1.8)f(2.5, 2.2)+f(2.5, 1.8))((2.21.8)(3.52.5)
=(26.1209.3+12.5)(41)=23.25

Jeffrey Jordon

Jeffrey Jordon

Expert2021-10-08Added 2605 answers

We need to estimate the values of fx(3,2)fx(3,2.2), and fxy(3,2)

We have f(3, 2) = 17.5 and f(3, 2.2) = 15.9.

For fx(3,2):

fx(3,2)=22.417.53.53=9.8.

For fx(3,2.2)

fx(3,2.2)=2615.93.53=20.2

Again,

For fxy(3,2)

We know that fxy(3,2)=(fx(3,2))y=fx(3,2.2)fx(3,2)2.22

 =20.29.80.2

= 52

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