MCQ
If $3^x = 6561,$ then $3^{x-3} =$
- A$81$
- ✓$243$
- C$729$
- D$27$
✓
Answer
Correct option: B.
$243$
$3^x = 6561$
$\Rightarrow 3^x = 3^8$
Comparing the exponent of both the sides, we get:
$x = 8$
Now, $3^{x-3} = 3^{8-3}$
$= 3^5 = 243$
Hence, the correct alternative is option $(b)$.
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