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x, y, z in R such that x^(2)+y^(2)+z^(2)...

x, y, `z in R` such that `x^(2)+y^(2)+z^(2)=1` and `alpha=x^(2)+2y^(2)+3z^(2)`

A

minimum value of `alpha` is 2

B

maximum value of `alpha` is 3

C

minimum value of `alpha` is 3

D

maximum value of `alpha` is 4

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The correct Answer is:
B
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