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i need help with these problems.How do you do these? * Find the equation of the normal to the curve y = e^x at the point where x=3, in exact form * Find the stationary point on the curve y=xe^x and determine its nature. Find any points of inflexion and find values of y as x becomes very...

plz help, how do i find the equation of the tangent to the parabola at the point (-2,2) for the parabola x^2=8y

thanks

how do i differentiate this h= 1 + x - x^2/40

i got confused half way through. could you help me on this one. find any points of inflexion in the curve y=2x^4 - 4x^3 - 24x^2 +6x-8

i don't know how to approach this problem since it asks to give reasons. give an explanation of what is meant by the term, 'point of inflexion', and give a diagram to illustrate your answer. Also state the condition required for a point to be a point of inflexion.

thanks, it makes sense now.

i don't get max and min problems. How does one approach these kind of questions. I'm struggling to do this one. A stone is thrown upward so that , at time T seconds after throwing, the height H metres is given by H=300T-50T^2. Find the time at which the max height is reached and find the max...

govt via the RBA helps influence the exchange rate

what the difference between those 2 ?

i was just wondering how many people are doing Brazil as their case study for economics. One teacher suggested to do a reasearch assignment (it's optional)on another country because Brazil is in the textbook and therefore alot of ppl would be doing it as their case study.