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Question

Hello, can anyone help with these questions? 

Thank you

Answer

(a) y  = x + 6/x

      p =  4 + 6/4   =5.5

(c)  y = 6.5  => x = 5.4

(d)  coordinates of point where gradient = -2 is (1.4, 5.7)

(e) y = 3x/2 + 6/x

plot this graph to obtain the solutions for  3x/2 + 6/x = 7

x         1              1.5              2             2.5              3            4      

y        7.5           6.25            6            6.15          6.5          7.5

You can stop as long as the 2 end points are > 7 which is the solution you want to find on the graph.

So, from the graph, correct to 1 decimal place, the 2 possible solutions for x is 1.1 and 3.5

Note:   You need a curve rule to draw the curve in order to get a more accurate answer

PS: Please click “Accept Answer” if the answer is correct.

1 Reply 2 Likes ✔Accepted Answer

This smells like an e-maths question.  I don’t like e-maths… so tedious.  I prefer A-maths!

1 Reply 0 Likes

I agree.  E Maths is straight forward and  tedious, A Math is conceptually more challenging.

0 Replies 0 Likes
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