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What is m? m = sqrt4 + cube root 4 + fourth root of 4

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What is m? m = sqrt4 + cube root 4 + fourth root of 4 [#permalink]  23 Jul 2006, 17:16
What is m?

m = sqrt4 + cube root 4 + fourth root of 4
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m = (4)^1/2 + (4)^1/3 + (4)^1/4

4^1/2 = 2
4^1/4 = 2^1/2 = 1.414
4^1/3 = 2^1/3 = ~1.6

Total = 5
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Why is 4^1/3 = 2^1/3 ???
Senior Manager
Joined: 20 Feb 2006
Posts: 375
Followers: 1

Kudos [?]: 1 [0], given: 0

Is the general rule not a^b = sq root a^2b

So shouldn't 4^(1/3) = 2^(2(1/3)) or 2^(1/3) * 2^(1/3) ????
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