1/25 =5^{x+4}

解答

\frac{1}{25} = 5^{x + 4}

x = - 6

求解步骤

\frac{1}{25} = 5^{x + 4}

使用指数运算法则

- 2 = x + 4

解

- 2 = x + 4 : x = - 6

x = - 6

7^{x - 10} = 25

8^{(x^{2} + 2 x - 15)} = 1

\frac{2 ^{x} - 2 ^{- x}}{3} = 4

9^{x} = 1

4^{x} + 4^{x - 1} + 4^{x - 2} = 336