Question

If y = 2x+8,then (X,y) is​

Answer 1

2x+8

then ,X=8-2

=6

I hope its work

Answer 2

If y=2x−8y=2x−8

Then xy=x(2x−8)⇒xy=2x2−8xxy=x(2x−8)⇒xy=2x2−8x

Therefore, our new function is f(x)=2x2−8xf(x)=2x2−8x

Now, our new function has a minimum value at its first derivative zero:

 f′(x)=ddx[2x2]−ddx[8x] f′(x)=2(2)x2−1−8(1)x1−1 f′(x)=4x−8 f′(x)=ddx[2x2]−ddx[8x] f′(x)=2(2)x2−1−8(1)x1−1 f′(x)=4x−8

So

0=4x−8⇔x=20=4x−8⇔x=2

Then, our new function has a minimum value at x=2x=2 And, it is:

f(2)=2(2)2−8(2)

f(2)=−8⇒y=−8