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Re: If f(x, y) = x2y and f(a, b) = 6, what is f(2a, 4b)? [#permalink]
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Explanation

The problem provides the function \(f(x, y) = x^2y\) and also the fact that when a and b are plugged in for x and y, the answer is 6. In other words:

\(f(x, y) = x^2y\)

\(f(a, b) = a^2b = 6\)

The problem asks for the value of f(2a,4b). First, plug 2a in for x and 4b in for y:

\(f(2a, 4b) = (2a)^2(4b)\)

\(f(2a, 4b) = 4a^2(4b)\)

\(f(2a, 4b) = 16a^2b\)

The problem already provides the value for the variables: a2b = 6. Therefore, \(16a^2b = 16(6) = 96\).
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Re: If f(x, y) = x2y and f(a, b) = 6, what is f(2a, 4b)? [#permalink]
Given that \(f(x, y) = x^2y\) and \(f(a, b) = 6\) and we need to find the value of \(f(2a, 4b)\)

To find f(a, b) we need to compare what is inside the bracket in f(a, b) and f(x, y)
=> We need to substitute x with a and y with b in \(f(x, y) = x^2y\) to get the value of f(a, b)

=> \(f(a, b) = a^2b\) = 6 given

Similarly, \(f(2a, 4b)\) = \((2a)^2*(4b)\) = \(4a^2 * 4b\) = 16 * \(a^2b\) = 16*6 = 96

So, Answer will be 96
Hope it helps!

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Re: If f(x, y) = x2y and f(a, b) = 6, what is f(2a, 4b)? [#permalink]
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Re: If f(x, y) = x2y and f(a, b) = 6, what is f(2a, 4b)? [#permalink]
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