$\"\"$

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Gradient of the function :

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$\"\"$ .

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Maximum value of the function is $\"\"$ .

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$\"\"$

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The function is $\"\"$ and the point is $\"\"$ .

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Gradient of the function : $\"\"$ .

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Substitute the point $\"\"$ in above equation.

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$\"\"$

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$\"\"$ .

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$\"\"$

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Find maximum value of the function.

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$\"\"$

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The maximum value of the function is $\"\"$ .

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$\"$

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The gradient of the function is $\"\"$ .

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The maximum value of the function is $\"\"$ .