solvefor x,ln(2x)=5

解答

求解

x, ln (2 x) = 5

x = \frac{e ^{5}}{2}

十进制

x = 74.20657 \dots

求解步骤

ln (2 x) = 5

使用对数运算法则

2 x = e^{5}

解

2 x = e^{5} : x = \frac{e ^{5}}{2}

x = \frac{e ^{5}}{2}

lo g_{3} (x^{2} - 8 x) = 2, x

lo g_{2} (x^{4}) = 32

lo g_{6} (2 x^{2} - 8 x + 12) = 2

lo g_{3} (x - 1) = e

(ln (x))^{3} = 3 ln (x)