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IGCSE MATHS Doubts

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Vin:
18 b)

(x-2)-1/2
------
(22)-1/2

x1
----
2-1

= 2x

-Cornea:
i)(x^27/27)^2/3
=(x^27*2/3)/(27^2/3)
=(x^9*2)(divide by 3) (cube root of 27 =3 square it =9)
so it will be (x^18/9)
as27^2/3 means cubic root and then squaring it

Malak:
Thx :D

Malak:
07 Jun P2 Q16 Part a

f(x) = 3x - 1

Find. in its simplest form

F^-1f(x)

In ms the answer is x how ???

astarmathsandphysics:
x
y=3x-1 so x=(y+1)/3 so f^(-1)( f(x))=(f(x)+1)/3=(3x-1+1)/3=x

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