For which pair of functions is open paren f circ g close paren times x is equal to x ?
A
f of x is equal to 1 half x minus 2 and g of x is equal to 1 half x plus 2B
f of x is equal to x squared and g of x is equal to 1 over xC
f of x is equal to the fraction with numerator x minus 2 and denominator 3 and g of x is equal to 2 minus 3 xD
f of x is equal to 2 over x and g of x is equal to 2 over x