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Let f(x, y) = xnym = P. If x is doubled and y is halved, the new value of f is

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  1. 2n-mP
  2. 2b-nP
  3. 2(n-m)P
  4. 2(m-n)P

Answer (Detailed Solution Below)

Option 1 : 2n-mP
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Detailed Solution

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Given:

P = xnym

Now x’ = 2x, y’ = y/2

∴ P’ = (x’)n(y’)m

P’ = (2x)n(y/2)m

Hence, option 1 is the correct answer. 

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