If z = 2xy - 3xy and x is increasing at 2 cm/sec determine at what...
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If z = 2xy - 3x²y and x is increasing at 2 cm/sec determine at what rate y must be changing in order that z shall be neither increasing nor decreasing at the instant when x = - 3 cm and y = 1 cm. If z = 2xy - 3x²y and x is increasing at 2 cm/sec determine at what rate y must be changing in order that z shall be neither increasing nor decreasing at the instant when x = - 3 cm and y = 1 cm.
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