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Which of the following expressions is equivalent to [tex][tex]$2^{3x-4}$[/tex][/tex]?

A. [tex][tex]$8x - 16$[/tex][/tex]
B. [tex][tex]$\frac{2^{3x}}{2^4}$[/tex][/tex]
C. [tex][tex]$2^{12x}$[/tex][/tex]
D. [tex][tex]$3x - 4$[/tex][/tex]

Sagot :

To find an expression that is equivalent to [tex]\(2^{3x - 4}\)[/tex], we can use properties of exponents to rewrite the given expression in a different form.

First, recall the property of exponents which states:

[tex]\[a^{b - c} = \frac{a^b}{a^c}\][/tex]

Applying this property, we consider [tex]\(a = 2\)[/tex], [tex]\(b = 3x\)[/tex], and [tex]\(c = 4\)[/tex]. This allows us to rewrite the expression [tex]\(2^{3x - 4}\)[/tex] as:

[tex]\[2^{3x - 4} = \frac{2^{3x}}{2^4}\][/tex]

Next, we need to evaluate [tex]\(2^4\)[/tex]. When we calculate this, we get:

[tex]\[2^4 = 16\][/tex]

Substituting this value back into our expression, we get:

[tex]\[2^{3x - 4} = \frac{2^{3x}}{16}\][/tex]

Hence, the expression that is equivalent to [tex]\(2^{3x - 4}\)[/tex] is:

[tex]\[\frac{2^{3x}}{16}\][/tex]