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受欢迎的代数 >

2-5(2x)^{4/5}=-78

解答

2 - 5 (2 x)^{\frac{4}{5}} = - 78

解答

x = 16, x = - 16

求解步骤

2 - 5 (2 x)^{\frac{4}{5}} = - 78

将

2

到右边

- 5 (2 x)^{\frac{4}{5}} = - 80

两边除以

- 5

(2 x)^{\frac{4}{5}} = 16

对方程式两边

5

次方:

16 x^{4} = 1048576

16 x^{4} = 1048576

解

16 x^{4} = 1048576 : x = 16, x = - 16

x = 16, x = - 16

验证解:

x = 16

真

, x = - 16

真

解为

x = 16, x = - 16

作图

流行的例子

x^{\frac{3}{4}} = 64

solvefor x,y=x^{1/3}

so l v e f or x, y = x^{\frac{1}{3}}

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2 9 x - 6 = 10 - 2 x

10 = x + 4

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