Which expression is not equal to the expression shown?

[tex]\[
\begin{array}{c}
3^3 \div 3 \\
3^{-3} \div 3^4 \\
3^7 \div 3^0 \\
3 \times 3^6 \\
3^3 \times 3^4 \\
\end{array}
\][/tex]



Answer :

Let's analyze each expression step-by-step and compare them:

1. Expression: [tex]\( \frac{3^3}{3} \)[/tex]
[tex]\[ = 3^{3-1} \quad \text{(Subtract the exponents since the bases are the same)} = 3^2 \][/tex]

2. Expression: [tex]\( \frac{3^{-3}}{3^4} \)[/tex]
[tex]\[ = 3^{-3-4} \quad \text{(Subtract the exponents)} = 3^{-7} \][/tex]

3. Expression: [tex]\( \frac{3^7}{3^0} \)[/tex]
[tex]\[ = 3^{7-0} \quad \text{(Any number to the power of zero is 1, so 3^0 = 1)} = 3^7 \][/tex]

4. Expression: [tex]\( 3 \times 3^6 \)[/tex]
[tex]\[ = 3^1 \times 3^6 \quad \text{(Since 3 is the same as 3^1)} = 3^{1+6} \quad \text{(Add the exponents because the bases are the same)} = 3^7 \][/tex]

5. Expression: [tex]\( 3^3 \times 3^4 \)[/tex]
[tex]\[ = 3^{3+4} \quad \text{(Add the exponents because the bases are the same)} = 3^7 \][/tex]

Now, comparing each of these simplified forms:
- [tex]\( \frac{3^3}{3} = 3^2 \)[/tex]
- [tex]\( \frac{3^{-3}}{3^4} = 3^{-7} \)[/tex]
- [tex]\( \frac{3^7}{3^0} = 3^7 \)[/tex]
- [tex]\( 3 \times 3^6 = 3^7 \)[/tex]
- [tex]\( 3^3 \times 3^4 = 3^7 \)[/tex]

We observe that all the expressions except for the second one ([tex]\( \frac{3^{-3}}{3^4} \)[/tex]) are equal to [tex]\( 3^7 \)[/tex] or can be simplified to [tex]\( 3^7 \)[/tex].

Thus, the expression that is not equal to the others is the second one: [tex]\( \frac{3^{-3}}{3^4} \)[/tex].

Therefore, the expression that is not equal to the others is:

Option 2: [tex]\( \frac{3^{-3}}{3^4} \)[/tex]

Hence, the expression which is not equal to the others is the second one, or equivalently, the answer is:

### 2

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