1) Iff(x) = 3 - 2x, calculate the value off-1 (5) .

2) Ifx ^2 +y ^2 = 25 andx ^2 -y ^2 = 7 thenx ^4 -y ^4 equals?

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- October 27th 2009, 08:29 AMsri340Inverse functions, solving equations.
1) If

*f*(*x*) = 3 - 2*x*, calculate the value of*f*-1 (5) .

2) If*x ^*2 +*y ^*2 = 25 and*x ^*2 -*y ^*2 = 7 then*x ^*4 -*y ^*4 equals?

- October 27th 2009, 09:02 AMramiee2010