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Linlin
Answers (1)
Using Maxima and Minima: Given: y = 4x² (upward) y = 30 - x² (downward) A = lw A = (2x)(30 - x² - 4x²) A = 2x(30 - 5x²) A = 60x - 10x³ A' = 60 - 30x² = 0 30x² = 60 x² = 2 x = +√2 w = 2√2 l = 30 - 5x² = 30-10 = 20 A(max) = lw = (2√2)*20 =
