Recent content by Krypto78

Before we close this chapter, can i ask what is the "name" given when removing the negative roots?

Thank you SO much for your help. What a great forum :)

So just to finish off, removing the negative roots would = 1/√x - 2/x^(3/2) ?

with the correction:- x^(-1/2) + -2x^(-3/2) x^(-1/2) = 1/√x 2x^(-3/2) this is where I am lost..... Thanks for the guidance guys

wow it really has been a long day. ok ok. Round the wrong way. so its -3/2

Hmmmmm now i am stumped.I think this is where I am going wrong. Going by the calculator it is -2/3. Is it 2/3( -and- = + thus 1/2 + 1) i feel like a plonker:(

Right where were we 2x^(0.5) + 4x^(-0.5) = (1/2)(2)x^(0.5 -1) + (-1/2)(4)x^(-1/2 - 1) = x^(-1/2) + -2x^(-2/3) Am i right so far

Oh boy..."bare". Is it too late to change that to "bear" :)

Thanks for the reply guys. Totally understand Mark, thanks for your input:) jbunniii can you go back 1 step. You simplified 2x/√x to be 2√x. Can i ask how you got this? on a side note i am doing a self study course so i am my own tutor at present. I really want to get a handle on this...

ill have a go 2x^0.5 + 4x^-0.5 am i on the right path?

Yes i got there in the end. Problem is I am doing a self study course and the notes are horrific. Wish i had knuckled down when education was free. Thanks:)

Homework Statement Given the equation f(x) = 2x+4/√x evaluate: (1) f(0.5) (2) f '(0.5) Homework Equations The Attempt at a Solution (1) is simply to substitute the value 0.5 into the equation (2) however i am assuming is to find the derivative of the equation...

Sorry for the late response. Thank you for the reply all sorted now thanks to ya:)

Homework Statement Determine the following and state quadrant. cos(-65°) Homework Equations I make this the 2nd quadrant. The Attempt at a Solution where:- -cos(180 - θ) -cos ( 180 - (-65)) -cos245 = 0.423 however i wasnt sure if it lied in the 4th quadrant...

seen my error its 2a not 5a in equation 1) so i have:- a = 0.875 b = 0.375 c = 1.125 substituting these value into all 3 equations proves correct e.g b - 3c = -3 0.375 - 3 x 1.125 does indeed = -3 how does that sound??