CAS Classpad 330 help

[Escobar]

lol
i can't seem to solve this equation on my CAS
can someone help me?
worked solution attached
i can't even solve the -260p^2... part
help help help
it just gives me the same equation that i typed in

[speedy]

lol
i can't seem to solve this equation on my CAS
can someone help me?
worked solution attached
i can't even solve the -260p^2... part
help help help
it just gives me the same equation that i typed in

For equations like this, the 'numSolve' application is your only hope (or solving numerically in main but that's dodgy). For this question, on my Classpad 400, it doesn't give a solution within the bounds :/
Nothing you can do except hope VCAA test all questions on all approved calculators (which they should)

[Escobar]

yeah it doesn't work for me either haha
ahhh
so scared

[faredcarsking123]

yeah it doesn't work for me either haha
ahhh
so scared

My friend has a similar issue

[meideh]

WOW you dont have to do any of that numerical solve, this is EASY as!

ok so after you simplify that 3rd line in the solutions you posted, you get to this:
-260p^2 x (p-1)^(37) x (35p+3)

Now, before letting it equal 0.47, notice that it's essentially like addition of ordinates
So, to make it easier put this in:
-260p^2 x (p-1)^(37) x (35p+3) | p=x        (this way it comes up as an expression that you can graph)

then you have:
-260x^2 x (x-1)^(37) x (35x+3)

So, just drag that or copy that line into Graphs&Tab... (to graph it)
-- if you want you can set restrictions (or just pick the answer that lies between 0 and 1)

once you've graphed it, go to:  Analysis>G-Solve>x-Cal
-- make y= 0.47
------------>MAKE SURE YOU ZOOM IN FIRST OR ELSE CALC WONT GIVE ANSWER<---------

then you get x= 0.052056...

therefore x= 0.0521 (4dp)





ALTOGETHER TAKES ABOUT 3 SECONDS AS OPPOSED TO 10 HOURS!!!!!!

[speedy]

Thanks heaps for this, I always forget about graphing, have to keep it in mind from now on