Recent content by gummibear0731

can you explain this in more depth..? i dont really understand it and my teacher doesnt know about it

1. find the volume of the solid formed when the curve y=(x+5)^2 is rotated about the y-axis from y=1 to y=4 2a. differentiate (2x^2+1)/(3x^2-4) b. hence evaluate (integral from 0 to 1) of x/(3x^2-4)^2 dx P.s. for question 2 i can do part a but dont know how to do part b. 3. find the...

I'm sure you're right... I haven't learnt that rule yet though... do we need to know it for year 12?

Sorry, I wasn't very clear. I have attached a screenshot of the question!

I have to differentiate: 3x/√3x-4+√3x-4 I end up getting (9√2)/8 but the answer is (3√2)8 I'm so close yet so far... help!

Yeah that's what i thought... do you think the textbook has the wrong answer?

hey, ive been trying to solve this calculus question from challenge exercise 8, but i dont understand the final part of the question. question: find the point of intersection between the tangents to the curve y=x^3-2x^2-5x+3 at the points where x =2 and x=-1. And so i find the...