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bml1105
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I just took my first diagnostic, so this may be a basic question.
One IR problem was:
"For all real values of x, the function f(x) has the form: f(x) = (x^2 - 4) ^-1. Select one value for v and one value for w that fulfills the condition that f(v) = w." Then it listed the options.
I was able to determine that if x=0, the f(x) = -1/4. However, in the answer choices, the correct answer is v = 0 and w = -1/4.
In these types of problems, am I supposed to sub in f(v) for f(x) and f(w) for (x^2 - 4)^-1? That's the only way to get those answers, but I'm confused on if this is something I should just be doing all the time throughout the GMAT.
Thanks in advance!
One IR problem was:
"For all real values of x, the function f(x) has the form: f(x) = (x^2 - 4) ^-1. Select one value for v and one value for w that fulfills the condition that f(v) = w." Then it listed the options.
I was able to determine that if x=0, the f(x) = -1/4. However, in the answer choices, the correct answer is v = 0 and w = -1/4.
In these types of problems, am I supposed to sub in f(v) for f(x) and f(w) for (x^2 - 4)^-1? That's the only way to get those answers, but I'm confused on if this is something I should just be doing all the time throughout the GMAT.
Thanks in advance!
