Search results

:) i just got one question. if your in yr 11, saying you do the hsc in 2006. how come you start diff now? arent you ment to have dont it mid year?

i dont exactly get you. but for example in the question A rectangle has perimeter of 32m. find the max area. (x) (16-x) = 32 16x -x^2 = 32 dy/dx = -2x + 16 dy/dx = 0 then 2x = 16 x=8 in this question there is only 1 answer which is a maximum . i would like know does this apply for all...

im not exactly talking about curves and where it turns. im talking about area's of rectangles shapes and etc. in these question dy/dx only has 1 answer

first you differentiate as you did y=x^2+bx+c y'=2x+b if you know m of tan = 7 m of tan = y' therefore 7=2x+b you know at origin x=0 then b is 7 ------------------------------------------------------------ * this bit is not apart of your question from there you you have y= mx+b y=7x+7...

I would just like to double check, when doing maximum and minimum points. A typical example would be Find the overall dimemsion if the totall area.......TO BE A MINIMUM. Normally what i do just just dy/dx - sub it in and etc. i get the answer and its normally correct. My question is - IF THE...