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Application Of Derivatives

Question
CBSEENMA12035524

Find the maximum profit that a company can make, if the profit function is given by p (x) = 41 + 24x – 18x2.

Solution

Here,    straight p left parenthesis straight x right parenthesis space equals space 41 plus 24 straight x minus 18 straight x squared               rightwards double arrow space space space space space straight p apostrophe left parenthesis straight x right parenthesis space equals 24 minus 26 space straight x
         straight p apostrophe apostrophe left parenthesis straight x right parenthesis space equals space minus 36
At space space space straight x space equals space 2 over 3 comma space space space straight p apostrophe apostrophe left parenthesis straight x right parenthesis space equals space minus 36 space greater than space 0 space space space space rightwards double arrow space space space space straight p left parenthesis straight x right parenthesis space has space local space maximum space at space straight x space equals space 2 over 3
But space straight p left parenthesis straight x right parenthesis space has space one space extreme space point space straight x space equals space 2 over 3 space space space space rightwards double arrow space space space straight p left parenthesis straight x right parenthesis space has space local space maximum space when space straight x space equals space 2 over 3
and space maximum space profit space space equals space 41 plus 24 space open parentheses 2 over 3 close parentheses minus 18 space open parentheses 2 over 3 close parentheses squared space equals space 41 plus 16 minus 8 space equals space 49