MCQ
$3^{-2} \times 3^{-5}$ is equal to:
- A$3^{-3}$
- B$3^{-10}$
- C$3^{7}$
- ✓$3^{-7}$
✓
Answer
Correct option: D.
$3^{-7}$
D. $3^{-7}$
Solution:
$3^{-2} × 3^{-5} = \frac{1}{3^2}\times \frac{1}{3^5}$
$=\frac{1}{3^{2+5}}$
$=\frac{1}{3^7}$
$=3^{-7}$
Solution:
$3^{-2} × 3^{-5} = \frac{1}{3^2}\times \frac{1}{3^5}$
$=\frac{1}{3^{2+5}}$
$=\frac{1}{3^7}$
$=3^{-7}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$2 \times 2 \times 2 \times 2 \times 2$ is equal to:
→Tax on imports is an example of $............$
→The angles of a quadrilateral are in the ratio $1 : 2 : 3 : 4.$ The smallest angle is.
→$6$ pipes are required to fill a tank in $1$ hour $20$ minutes. If we use $5$ such types of pipes, how much time it will take to fill the tank?
→Which of the following is a perfect square number?
Observe the following velocity-time graph and answer the related questions:
What is the fall in velocity from $7$ to $11?$
→What is the fall in velocity from $7$ to $11?$
The algebraic expression $3x + 2y + 6$ is
→The ages of $A$ and $B$ are in the ratio $5: 7$. Four years from now the ratio of their ages will be $3: 4$. The present age of $B$ is
→If one angle of a parallelogram is $24^\circ $ less than twice the smallest angle then the largest angle of the parallelogram is:
→$a^2- b^2$ is equal to
→