zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的代数 >

pir^4=4.8610^{-7}

解答

π \cdot r^{4} = 4.86 \cdot 1 0^{- 7}

解答

r = \frac{3.86747 E 15}{5 4 1.0 E 21}, r = - \frac{3.86747 E 15}{5 4 1.0 E 21}, r = \frac{3.86747 E 15}{5 4 1.0 E 21} i, r = - \frac{3.86747 E 15}{5 4 1.0 E 21} i

求解步骤

π r^{4} = 4.86 \cdot 1 0^{- 7}

化简

4.86 \cdot 1 0^{- 7} : \frac{4.86}{10000000}

π r^{4} = \frac{4.86}{10000000}

两边除以

π

r^{4} = 1.54699 E - 7

用

u = r^{2}

和

u^{2} = r^{4}

改写方程式

u^{2} = 1.54699 E - 7

解

u^{2} = 1.54699 E - 7 : u = 1.54699 E - 7, u = - 1.54699 E - 7

u = 1.54699 E - 7, u = - 1.54699 E - 7

代回

u = r^{2}

，求解

r

解

r^{2} = 1.54699 E - 7 : r = \frac{3.86747 E 15}{5 4 1.0 E 21}, r = - \frac{3.86747 E 15}{5 4 1.0 E 21}

解

r^{2} = - 1.54699 E - 7 : r = \frac{3.86747 E 15}{5 4 1.0 E 21} i, r = - \frac{3.86747 E 15}{5 4 1.0 E 21} i

解为

r = \frac{3.86747 E 15}{5 4 1.0 E 21}, r = - \frac{3.86747 E 15}{5 4 1.0 E 21}, r = \frac{3.86747 E 15}{5 4 1.0 E 21} i, r = - \frac{3.86747 E 15}{5 4 1.0 E 21} i

作图

流行的例子

x^{4} - 265 x^{2} + 1 = 0

x^{4} x - 8 = 2 x - 4

- 2 = 2 x^{5} + x^{3} + 1

(2 - x^{2})^{2} - 1 = 0

m^{4} - 13 m^{2} + 36 = 0