Lesson: Other Roots

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You say a root will have at most 1 value. But doesn't the 4th root of 16 = 2 and -2, because 2^4 = 16 and -2^4 = 16? Thanks!
-Yvonne
gmat-admin's picture

When it comes to root notation involving even roots (e.g.m square root, 4th root, 6th root, 8th root, etc.), the root NOTATION tells us to take only the positive root.

So on the gmat test, will is also follow this rule ?
gmat-admin's picture

Yes, most definitely.

Reinforcement activities (counting top-down) #1 and #5 link to the same exercise.
gmat-admin's picture

Thanks for the heads up, BalysLTU!
I have removed one of the links.

Cheers,
Brent

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