maths p3

[ahmed t]

hey i know if we have the roots to a function f(x)
then to find the roots to f(x^2) we must square root the roots of f(x)
does that mean if i have f(x^n) and i want the roots all i do is nth root my results of f(x)?

 

[WellWIshER]

is dis in p3?????

 

[ahmed t]

u must know that f(X^2)'s roots are square roots of f(x)'s roots
but im asking for general knowledge about the last part

 

[WellWIshER]

DID DIS COME in any past paper p3!!! :Search:

 

[ahmed t]

chek out p33 o/n 10
q10

 

[WellWIshER]

DUDE do need to revise AS MATHS TO GIVE IT!!!

 

[sourgho16]

is that a proof or something....how can you say that?

 

[ahmed t]

not realy u dont need As math to get the anser

 

[WellWIshER]

thank god i remember nothing os AS!!!! MATH

 

[ahmed t]

but u never ansered my question
was my statement correct?

 

[sourgho16]

are you just saying that because its given in the mark scheme??/

 

[ahmed t]

saying what???

 

[ks136]

yes ahmed...u r right..
e.g if it was f(x^3) then u'll solve the cube root of the roots of fx

 

[ahmed t]

thnx

 

[ks136]

thnx

then click the thanks button

 

[WellWIshER]

waT IS DA GRAPH OF ln|2x-5|???

 

[ahmed t]

sorry

 

[ahmed t]

u dont have to know it exactly all u need to know is that there is an asymptote at x=5/2 and the x intercept is at x=3
thats about it
u can substitute values of x in the equation and find y and plot these points for a more accurate graph but the probably asked for a sketch