Foo Pang Min's answer to Peter Polo's Secondary 3 A Maths question.

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Foo Pang Min
Foo Pang Min's answer
2 answers (Tutor Details)
1st
Take out square root of 3 so that a whole number can be computed within the bracket as 81. Since 81 is 3 to the power of 4 and square root of 3 is 3 to the power of 1/2, then k will be equal to 9/2 or 4.5.