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受欢迎的代数 >

-1*2^{x-7}+9=3

解答

- 1 \cdot 2^{x - 7} + 9 = 3

解答

x = \frac{ln ( 6 )}{ln ( 2 )} + 7

+1

十进制

x = 9.58496 \dots

求解步骤

- 1 \cdot 2^{x - 7} + 9 = 3

乘以:

1 \cdot 2^{x - 7} = 2^{x - 7}

- 2^{x - 7} + 9 = 3

将

9

到右边

- 2^{x - 7} = - 6

两边除以

- 1

2^{x - 7} = 6

使用指数运算法则

(x - 7) ln (2) = ln (6)

解

(x - 7) ln (2) = ln (6) : x = \frac{ln ( 6 )}{ln ( 2 )} + 7

x = \frac{ln ( 6 )}{ln ( 2 )} + 7

作图

流行的例子

3^{200}+3^{200}+3^{200}=3^x

3^{200} + 3^{200} + 3^{200} = 3^{x}

log_{9}(81^x)=-2

lo g_{9} (8 1^{x}) = - 2

4^{2 x} = \frac{1}{32}

solvefor n,x^n+n=0

so l v e f or n, x^{n} + n = 0

solvefor x,4^x=8^{x-1}

so l v e f or x, 4^{x} = 8^{x - 1}