In: Advanced Math
(c) [2] For which of the following functions are the level curves linear?
(I) f(x, y) = tan(x + y)
(II) g(x, y) = e^y/x (e to the power of y over x)
(III) h(x, y) = ln(xy)
(A) none (B) I only (E) I and II (F) I and III
(C) II only (G) II and III
(D) III only (H) all three
A partial table of values for a function f(x,y) is given below. Which of the following are positive?
(I) fy(4, 1)
(II) fx(4, 1) (III) fxx(4, 1)
x=3 |
x=4 |
x=5 |
x=6 |
|
y=0 |
2.3 |
2.2 |
2.0 |
1.7 |
y=1 |
2.4 |
2.5 |
2.7 |
3.0 |
y=2 |
2.5 |
2.7 |
2.9 |
3.2 |
y=3 |
2.6 |
3.0 |
3.0 |
3.3 |
3.
Thus it is not a linear equation . so only option I is a linear eqn Option B only I is correct.
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