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受欢迎的代数 >

4^x+2^{1+2x}=20

解答

4^{x} + 2^{1 + 2 x} = 20

解答

x = \frac{ln ( \frac{20}{3} )}{2 ln ( 2 )}

+1

十进制

x = 1.36848 \dots

求解步骤

4^{x} + 2^{1 + 2 x} = 20

使用指数运算法则

2 x ln (2) = ln (\frac{20}{3})

解

2 x ln (2) = ln (\frac{20}{3}) : x = \frac{ln ( \frac{20}{3} )}{2 ln ( 2 )}

x = \frac{ln ( \frac{20}{3} )}{2 ln ( 2 )}

作图

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