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Thanks for the responses guys. Question 1a and b were asked to differentiate, sorry i didn't mention that. Im having a hard time interpreting some of the answers you guys gave so heres an image of where I got to with 1a and 1b, hopefully you can tell me where I have gone wrong. Just for...

Hi, any help with the following questions would be greatly appreciated. BTW, the 1 above the f in question 2a is supposed to indicate the derivative of, not to the power of 1.

Ok, I have amended ranks to include the include the entire size of the class. Are you saying that I should gain information about the average marks from all of my subjects and then plugging those figures into SAM to get an estimate UAI?? Would these figures be available online or would I have to...

Hi, I currently need a UAI min of 85.00 to enter into a BTech degree I want to do at uni. I have read hundreds of articles on this site on how to predict UAI but all seem to confuse me. So I am wondering if you guys can help give a 'ball park' of where I can expect my UAI to be at the moment...

Ok thanks guys, made sense. Just one question, I see how you guys found the stationary point but how did you prove it was a maximum point, don't you need the second derivative for that? I am also a little lost as to what happened with the 0.5 out the front...

Im sorry guys, I've poorly written the formula. I have uploaded a more accurate copy, the x is actually a pronumeral not a multiplaction sign. Im sorry for wasting your time, I should have made it more clear. Any help would be greatly appreciated however. Once again, my apologies.

Hi, just wondering if anyone can help me solve this question regarding the practical use of calculus. A 5m length of timber is used to border a triangular garden bed with the other sides of the garden against the house walls. i.e. ___|\ ___|=\ ___|==\ 5m __x|===\ ___|====\ ___|=====\...

Thank you very much, I knew there must have been something I was not seeing. Thanks again.

Ok but should the answer not be 28e2x(e2x+1)(6e2x+1) because 28x6=168 and as 28x7=196???

Ok I understand everything except for the last part, how did you factorise to get 28e2x(e2x+1)5(7e2x+1)???

Thanks for the quick response. The first question is correct however the answer the back of the book for the second question is: 168e4x(e2x+1)5+28e2x(e2x+1)6 = 28e2x(e2x+1)5(7e2x+1) I originally had the same answer you gave, could the answer in the back be incorrect, I can not see how they...

Hi, I have two questions here that really puzzled me, they both involve using the Function of a Function Rule with regard to exponential functions, both times I seem to get the incorrect answer so a step-by-step explaination would be greatly appreciated. 1) Differentiate e2x+1/2x+5 2) Find the...

Thanks for all the help, made alot of sense :).

Ok thanks for the help. I am still a little confused with the second questions however. When I make y the subject and make it y2 I get y2=(x-1/-3)2, is this correct? Would I then intergrate to get (x-1/3)3 over 3???

Hi, came across these today and struggled abit with the following questions: 1) Find the volume of the solid of revolution that is formed when the curve y=x^2+2 is rotated about the x-axis from x=0 to x=2. (The x^2 seems to confuse me here) and... 2) Find the volume of the solid formed whe...

Ah ok i finnally got it. I had to do it in two parts, I figured out where the line y=-3x+4 and curve y=x^3 intercepted which was at 1. Then I found the area of each seperatly i.e. y=x^3 with borders 0 and 1 and y=-3x+4 with borders 1 and 4/3. Then when both areas were added together I got...

Ah I see know, i was looking at the wrong approach to get the boundaries. One issue now, when I integrate (x^4)/4 + (3x^2)/2 - 4x, with borders 0 and 4/3 I get an incorrect answer??? I should get 0.42 units^2 as an answer.

Yes but how did you find out what the border are. I can only seem to get x=1 as a border after drawing a the line and curve and am unsure of the other?

Thanks guys i am understanding how it works now. However I do have another one which I am stuck on: Find the area enclosed between the curve y=x^3, the x-axis and the line y=-3x+4. So far I have come to x^3+3x-4=0 but have no idea how to factorise from here?

Ok, I still dont really understand how I can solve this as y=5 is not a curve. Im unsure of what area I have to measure.