77=13^x

解答

77 = 1 3^{x}

x = \frac{ln ( 77 )}{ln ( 13 )}

十进制

x = 1.69352 \dots

求解步骤

77 = 1 3^{x}

使用指数运算法则

ln (77) = x ln (13)

解

ln (77) = x ln (13) : x = \frac{ln ( 77 )}{ln ( 13 )}

x = \frac{ln ( 77 )}{ln ( 13 )}

9^{x} - 3^{x + 1} + 1 = 0

3^{(n - 1)} = 1200

so l v e f or x, x^{2} = 2^{x}

0.08 = \frac{20}{2 ^{x}}

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