Question

xy=4 whats dx/dt when x=1 and dy/dt=-6

Answer 1

rephrase, please!

Answer 2

What are the equations? and what are you looking for?

Answer 3

He left! Why?

Answer 4

im looking for dx/dt

Answer 5

Do you guys get the question?

Answer 6

when xy=4 and x=1?

Answer 7

its 3/2

Answer 8

can you help me with the differentiating part

Answer 9

xy=4
x=1
dy/dt=-6

Answer 10

use d(xy)=x.y' + x'y=d(4) and xy=4 as x=1 y=4

Answer 11

So... xy=4, x=1
plug in 1 for x, (1)4=y,
y=4

d4/dt=6
d s cancel

Answer 12

@chels.408 do you need more help with understanding this?

Answer 13

You have:
xy=4
x=1
dy/dt=-6

Looking for:
dx/dt

Answer 14

yeah but its a related rates problem

Answer 15

x=1, plug that into
xy=4
(1)y=4
so y=4

NOW:
dy/dt=-6
plug 4 for y into the above equation.
4d/dt=-6
cancel out Dees
4/t=-6
t=-3/2

Ur looking for:
dx/dt
So plug in 1 for x and -3/2 for t