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3(1) y = x^2√x/x^(1/4) = x^2*x^(1/4) = x^(9/4)
y' = (9/4)x^(5/4)
(2) y = x^2x^(1/8) = x^(17/8), y' = (17/8)x^(9/8)
5. y = √x, y' = 1/(2√x), x = 4 处 切线斜率 k = y' = 1/4,
切线方程 y - 2 = (1/4)(x-4), 即 x - 4y + 4 = 0
y' = (9/4)x^(5/4)
(2) y = x^2x^(1/8) = x^(17/8), y' = (17/8)x^(9/8)
5. y = √x, y' = 1/(2√x), x = 4 处 切线斜率 k = y' = 1/4,
切线方程 y - 2 = (1/4)(x-4), 即 x - 4y + 4 = 0
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