If f(x, y) = √6xy - 4x + 30y then fa = Select one: O True O False -4√6xy+3y √6xy

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A: We can answer the question as below using the rules of derivative.

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A: We can answer the questions as below.

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A: Given.

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Q: Can you please show the working i do not understand.

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A: topic- application of derivatives

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A: Solution is given below:

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A: To find the value of y' for the given function.

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A: We can solve this as follows:

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A: The graph shows the average monthly cellular phone bill since 1987. The slope of the curve at point…