p = | x - 2 | + | x +2 |
Consider the above equation for the following discussion
Is it ok to form the following combinations while trying to interpret the value of p?
Form combinations like
P= -(x-2)+(x+2) = 4
P=-(x-2)-(x+2) = -2x-4
P=+(x-2)-(x+2) = -4
P=+(x-2)+(x+2)= 2x
170) Interpreting modulus
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- ChrisHinkle
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Well your third equation is definitely inaccurate. We know at a minimum that the sum in question is not negative since absolute value is never negative.
It looks to me like a better bet is to consider values between 2 and -2, in which case the answer is always 4, vs. values outside of that range which come to the absolute value of 2x.
I'm interested in what the problem might be asking for?
It looks to me like a better bet is to consider values between 2 and -2, in which case the answer is always 4, vs. values outside of that range which come to the absolute value of 2x.
I'm interested in what the problem might be asking for?
Chris Hinkle
GMAT Instructor, The Princeton Review
GMAT Instructor, The Princeton Review