179: Solucionario Calculo Una Variable Thomas Finney Edicion 9

Setting the numerator to zero (the denominator never vanished inside the feasible interval) produced

which simplified to

Maya wrote the result in bold, underlined it, and added a small smiley face next to it—her personal signature of triumph. The next morning, the professor walked into the seminar room, a stack of papers in his hand. He asked the class to volunteer a solution for Exercise 179. Maya’s hand rose, heart thudding like a metronome. Setting the numerator to zero (the denominator never

A ripple of impressed murmurs ran through the class. The professor nodded, his eyes twinkling. “Excellent,” he said. “You’ve illustrated perfectly how a multivariable problem can sometimes be reduced to one variable, and how the critical point tells us the shape of the optimal object. Well done, Maya.” Maya’s hand rose, heart thudding like a metronome