Hi,
|x| = -x for x<0
So, sqrt(-x|x|) = sqrt(-x(-x)) = |x|, as sqrt is always non-negative.
= -x
Hence, 1
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Let x = -2.divya23 wrote:If x<0,then √(-x|x|) is
-x
-1
1
x
sqrtx
[spoiler]OA = 1[/spoiler]
√(-(-2)*|-2|) = √(2*2) = 2. This is our target.
Now we plug x=-2 into the answers to see which yields our target of 2.
Only answer choice A works:
-x = -(-2) = 2.
The correct answer is A.
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Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
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