



 
Hi Joan, For part a) substitute x = 1 in the expression
to get
Solve for f(1). This technique doesn't work for part b) since substitution of x = 2 yields
Which is one equation in two unknowns, f(2) and f(1/2). To solve for f(2) you need a second equation containing f(2) and f(1/2), What happens when you substitute x = 1/2 into the defining equation? Penny  


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