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iin77 · 11-17-2007, 10:08 PM

Here's how I'd do it:

You know four of them are correct, and you know there's four different "types" of numbers that x can be. It can be a negative greater than one, negative less than one, positive less than one, or positive greater than one.

So... just use -2,-1/2, 1/2, 2 and find the x,x^2,x^3 values for all four, and rank them using inequalities. Each one matches one letter, leaving one answer left over.

Hope this helps.

11-17-2007, 10:08 PM	#11
iin77 Member Join Date: Feb 2007 Location: Iowa Posts: 722	Here's how I'd do it: You know four of them are correct, and you know there's four different "types" of numbers that x can be. It can be a negative greater than one, negative less than one, positive less than one, or positive greater than one. So... just use -2,-1/2, 1/2, 2 and find the x,x^2,x^3 values for all four, and rank them using inequalities. Each one matches one letter, leaving one answer left over. Hope this helps.
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