log_{2}(x+5)=4

解答

lo g_{2} (x + 5) = 4

x = 11

求解步骤

lo g_{2} (x + 5) = 4

使用对数运算法则

x + 5 = 16

解

x + 5 = 16 : x = 11

x = 11

lo g_{8} (x) = \frac{- 2}{3}

ln (x) + ln (x - 6) = ln (7 x)

lo g_{5} (x) = 1 + lo g_{5} (x - 4)

lo g_{3} (3 0^{x} - 9) = 0

so l v e f or x, 2 ln (x + 1) = - 2