Question

Algebra and differentiation question.

Answer 1

Given the equation in image 1

Answer 2

Show that it can be arranged as seen in image 2

Answer 3

I did the rearraging part and it worked out fine its the last part in the 2nd image I cannot do

Answer 4

"Hence show that x1 does not show a optimum is respect to Q

Answer 5

I have the solution but I have no idea where my lecturer got his answer from.

Answer 6

If anyone could break it down it for me it would very helpful.

Answer 7

Here's the answer

Answer 8

what's that ?? total differential eqn?

Answer 9

That last pic I uploaded proves that Hence show that x1 does not show a optimum is respect to Q

Answer 10

which part of answer is not clear for u?

Answer 11

The very last part of the question where the question states "hence show that x1 does not show a optimum is respect to Q"

Answer 12

I posted the solution to it above but my lecturer did not explain how he got it.

Answer 13

looks like simple differentiation.

Answer 14

I have no idea, still. I have done everything right until that point, I've arranged the equation to get x1=.....

Answer 15

http://www.wolframalpha.com/input/?i=differentiate+%28ax%29%2F%28x+-+bc%29+with+respect+to+x

Answer 16

Ah quotient rule! I've rarely have to use this, completely forgot about it.

Answer 17

what do you mean by optimum? how do you find out optimum ... of this curve
y = (x - 2)^2 + 4

Answer 18

@experimentX I have no idea to be honest, he just states based on the differential equation, is does not show an optimum, I am not going to argue with it haha

Answer 19

well .. you get optimum values at these points.