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If y=kx^{1/4} and y=3√2 at x=81, what is the value of y at x=4?

 Mar 8, 2022
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y = k x1/4  

3 sqrt 2 = k (81)1/4

   k = sqrt 2

 

y = sqrt 2 ( 4)1/4  =   sqrt 2 (22)1/4  = sqrt 2   ( 21/2 ) =   sqrt2  sqrt 2  = 2

 Mar 8, 2022

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