化简 sqrt(0.2^2+0.2^2)

解答

化简

0. 2^{2} + 0. 2^{2}

\frac{2}{5}

十进制

0.28284 \dots

求解步骤

0. 2^{2} + 0. 2^{2}

0. 2^{2} + 0. 2^{2} = 0.08

= 0.08

0.08 = \frac{2}{25}

= \frac{2}{25}

使用根式运算法则:

\frac{a}{b} = \frac{a}{b}, a \geq 0, b \geq 0

= \frac{2}{25}

25 = 5

= \frac{2}{5}

48 x^{2} + 16 x - 15 = 0

5 x + 14 > 40 - 8 x

lo g_{\frac{1}{4}} (2 - x) > lo g_{\frac{1}{4}} (\frac{2}{x + 1})

2 b = 10

∣ - 5 x - 3 ∣ \geq 8