Can someone kindly give me a step by step solution to question 11 on this paper, it would be greatly appreciated
For part (i) draw suitable lines on the graph to find the points of intersection. Part (ii) is simultaneous equations, and part (iii) you have to consider the graphical plot of the given circle.
Okay thanks i now understand how to do 2 and 3, can you help me with the equations of the graphs i need to draw? like the first one, how do i rearrange it to do it?
Okay thanks i now understand how to do 2 and 3, can you help me with the equations of the graphs i need to draw? like the first one, how do i rearrange it to do it?
Well the graph is y = x + (1/x), and it is asking you to find x + (1/x) = 4. So y = ...?
That's the y coordinate of the intercepts, you need to find the x coordinates because the equation is just in terms of x. How would you do this, knowing that y=4?
ohh look for the x intersection with the graph, thank you!
What about the second one?
Exactly what did you get as your points of intersection?
This one is a little more tricky, you want to end up with x + (1/x) on one side of the equation (so you can use the graph of y = x + (1/x)), so you need to do a bit of rearranging. HINT: consider the 2x term
i think its the bx thats confusing me, so its b^2 - 4 =0?
Nope how many x^2's are there (this is your a). How many x's are there (this is your b). All the other terms which do not have an x in front of them are your "c", just add them all together.