Thursday

October 2, 2014

October 2, 2014

Posted by **ANON** on Sunday, September 30, 2012 at 2:09pm.

thus f-1(x)=2-sqrt(-x+6)

i need to show that f(f-1(x))=x, but i keep getting negative x...any help

- precalc -
**Reiny**, Sunday, September 30, 2012 at 3:28pmby definition ...

f(f^-1 (x)) = x , but anyway ...

f( f^-1(x) )

= f(2 - √(6-x) )

= 2 + 4(2 - √(6-x) ) - (2 - √(6-x) )^2

= 2 + 8 - 4√(6-x) - (4 - 4√(+-x) + 6-x)

= 10 - 4√(6-x) - 4 + 4√(6-x) - 6 + x

= x

**Answer this Question**

**Related Questions**

math,algebra,help - Directions are simplify by combining like terms. x radiacal ...

Math Help please!! - Could someone show me how to solve these problems step by ...

math,correction - is this correct: solve by using the quadratic formula 5x^2+x=3...

Precalc - 1. Solve log (4x) = log (2) + log (x-1) the fact that this is x-1 and ...

Calculus - Find f(x) so that it satisfies: f'(x)=1/sqrt(x) and f(4)=2. Please ...

Calculus - This is a large problem, sorry for the trouble. if f(x) = sqrt(x^3 + ...

Algebra - Solve for s: h=(square root of 3)times s/2 and solve for h V= (pi)r ...

PreCalc - Someone please help me solve this equation for y. (x^2)(y^2)+xy=1 I ...

Algebra 1B - How do I solve \sqrt{\frac{33xy^{3}}{\sqrt{3x}}}? I am getting so ...

Precalc - Coordinates in 3D - Polar Coords - Show that r = cos theta is a graph ...