Let f(x, y, z) = xyz(1 + eyz). Find .

A. xy(1 + eyz) + xy2zeyz
B. xy(1 + eyz) + xy(1 + yeyz)
C. xy(1 + yeyz)
D. xy(1 + ey)
E. none of these


Answer: A

Mathematics

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Find fx, fy, and fz.f(x, y, z) = ln (xy)z

A. fx = - ; fy = - ; fz = ln (xy)
B. fx = ; fy = ; fz = z ln (xy)z - 1
C. fx = ; fy = ; fz = ln (xy)
D. fx = z ln ; fy = z ln ; fz = ln (xy)

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Solve.The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 200 yards with a 7-iron, how far should he average with a 5-iron?

A. 167 yards B. 211 yards C. 189 yards D. 240 yards

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