Check it here: Wolfram|Alpha—Computational Knowledge Engine
Hi, can someone double check this for me?
Also sorry about the badly written problem. What programs do you all use? I tried word but i couldn't import it over to here.
Also, when you do the power, you do that keep that sign first and then incorporate either the - or + sign next right?
So lets say x=-2, for (x^5)-(X^3)=
you do -2*-2*-2*-2*-2 which is -32 and then you do -2*-2*-2 which is -8. Then the last step is to subtract -32- (-8) but since there is two neg. signs, -8 becomes a positive 8 right? so it is -32+8
Thanks
Check it here: Wolfram|Alpha—Computational Knowledge Engine
LaTeX help subforum
You wrote a plus sign where it should have been minus sign, right before the 8/3.
I don't follow..
That is correct. If you have a function g(x) = x^5 - x^3 then g(-2) = -24.
Note that you know in advance that (-2)^5 is negative because the exponent is odd. So it's just -2^5. (Note the lack of parentheses. Meaning take 2^5 and then negate it.)
You seem to have typed the wrong thing into Wolfram Alpha. The answer is -4. See here.
So this is right, just make sure you get -4 as final answer.
Edit: I thought you were just evaluating the thing inside parentheses first, and then would remember to negate it afterwards. It looks like you were making the mistake pointed out in Archie Meade's post below mine though.