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受欢迎的代数 >

(4 x/2)(4 x/5)=4^8

解答

(4 \frac{x}{2}) (4 \frac{x}{5}) = 4^{8}

解答

x = 6410, x = - 6410

+1

十进制

x = 202.38577 \dots, x = - 202.38577 \dots

求解步骤

(4 \cdot \frac{x}{2}) (4 \cdot \frac{x}{5}) = 4^{8}

化简

\frac{8 x ^{2}}{5} = 65536

在两边乘以

5

\frac{5 \cdot 8 x ^{2}}{5} = 65536 \cdot 5

8 x^{2} = 327680

两边除以

8

\frac{8 x ^{2}}{8} = \frac{327680}{8}

x^{2} = 40960

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

x = 40960, x = - 40960

40960 = 6410

- 40960 = - 6410

x = 6410, x = - 6410

作图

流行的例子

化简 1/4-1/5+1/6-1/8

s im pl i f y \frac{1}{4} - \frac{1}{5} + \frac{1}{6} - \frac{1}{8}

35x^2-835x+2700>= 0

35 x^{2} - 835 x + 2700 \geq 0

-2(x+3)-3x<7(x-4)+x

- 2 (x + 3) - 3 x < 7 (x - 4) + x

1/2 =e^{1/2 (0)^2}

\frac{1}{2} = e^{\frac{1}{2} (0)^{2}}

∣ x ∣ + 8 \geq - 5