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Andrew [12]
3 years ago
12

Solve the exponential equation 1/16=64^4x-3

Mathematics
2 answers:
Otrada [13]3 years ago
7 0
\frac{1}{16} = 64^{4x-3} ,
 \frac{1}{4^2} =( (4)^3)^{4x-3},
 4^{-2} =(4)^{3(4x-3)},
-2=3(4x-3)

,-2=12x-9,
12x=-2+9=7,
x= \frac{7}{12}

zhannawk [14.2K]3 years ago
6 0

Answer:

x=\frac{7}{12}

Step-by-step explanation:

We have been given an equation:

\frac{1}{16}=64^{4x-3}

In order to solve this equation we will convert the base same on both sides of equation:

we can write 16\text{as}4^2\text{and}64\text{as}4^3 we get:

\frac{1}{4^2}={4^3]^{4x-3}

Now, using \frac{1}{x^n}=x^{-n}

Here, n is 3 and x is 4 on l;eft hand side of the above equation:

4^{-2}=4^{3\cdot (4x-3)}

4^{-2}=4^{12x-9}

We can equate the powers when base are same

Hence, 12x-9=-2

Now, we will solve for x we get:

12x=7

x=\frac{7}{12}

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