((7+17))/(2+nx^4)=20

解答

\frac{( 7 + 17 )}{2 + n x ^{4}} = 20

x = \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n} + i \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n}, x = - \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n} - i \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n}

求解步骤

\frac{( 7 + 17 )}{2 + n x ^{4}} = 20

化简

\frac{7 + 17}{2 + n x ^{4}} : \frac{24}{2 + n x ^{4}}

\frac{24}{2 + n x ^{4}} = 20

在两边乘以

2 + n x^{4}

24 = 20 (2 + n x^{4})

解

24 = 20 (2 + n x^{4}) : x = \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n} + i \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n}, x = - \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n} - i \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n}

x = \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n} + i \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n}, x = - \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n} - i \frac{5 ^{\frac{3}{4}} n ^{\frac{3}{4}}}{5 n}

so l v e f or y, x = \frac{3 y - 8}{7 - 6 y}

so l v e f or y, x = \frac{y - z}{y}

- \frac{12}{s} = - 3

\frac{6}{x} = \frac{5}{x - 1}

\frac{1}{4 b - 2} = \frac{- 1}{2 b + 4}