I have used the SHARP calculator since year 7, the exact same one. I dont Get math errors when I type in -8^(5/3)/5 though. The sharp calcuator is a very good calculator. Although I have found that Casio are better at calculating fractions of larger decimals.
Correct and if you remember your index laws anyway x^(2/3) you are squaring and then taking the cube root so you are taking a positive cube root anyway. because any number squared is positive in the real number system.
when you do this you have to consider the graph. Seeing as though they are not asking for an area and what you are integrating is an even function. i.e. F(x) = F(-x) then it becomes:
\int_{-a}^{a}f(x) = 2\int_{0}^{a}f(x)
so in your case
\int_{-8}^{8}x^{\frac{2}{3}}dx...
I found this text in another thread
I am going to use it I just need some things to talk about other than the obvious contrast between the cells. And some background on the conflict would be nice :)
I am having a bit of trouble
For examble a particle is moving downards with a resistance proportional to v<sup>2</sup>
In this part you get an equation that looks like:
ma = mg - mkv<sup>2</sup>
What I dont understand is why the resistance is equal to mkv<sup>2</sup> when there is...
y= 3cos^{-1}2x\\ \frac{y}{3}=cos^{-1}2x\\ cos\frac{y}{3}= 2x\\ x= \frac{1}{2}cos\frac{y}{3}
and then just use the equation in terms of x to draw your graph and rember the restricted d & r when you draw it.
Someone suggested in an older forum to tape batteries to your pen in normal situations and in an exam write without them...I dunno if it will work. but give it a go