SOLUTION: If the arithmetic mean of x^1/2 and x^1/4 is 6 . then x is equal to A 64 b 81 c 144 d 256 e none of these

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Question 280306: If the arithmetic mean of x^1/2 and x^1/4 is 6 . then x is equal to
A 64 b 81 c 144 d 256 e none of these
Found 2 solutions by pandion, Alan3354:
Answer by pandion(6) About Me  (Show Source):
You can put this solution on YOUR website!
none of these

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If the arithmetic mean of x^1/2 and x^1/4 is 6 . then x is equal to
A 64 b 81 c 144 d 256 e none of these
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81%5E%281%2F2%29+%2B+81%5E1%2F4%29%29+=+12
12/2 = 6 so b fits
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256%5E%281%2F2%29+%2B+256%5E%281%2F4%29+=+16+-+4+=+12
12/2 = 6 so d fits