Question

evaluate
$( {5}^{ - 1} \times {2}^{ - 1} ) \times {6}^{ - 2}$
evaluate this​

Answer 1

Answer:

30^-1

Step-by-step explanation:

$5 {}^{ - 1} \times {2}^{ - 1} \times {6}^{ - 2 } \\ = \frac{1}{5} \times \frac{1}{2} \times \frac{2}{6} \\ = \frac{2}{60} \\ = \frac{1}{30} \\ = {30}^{ - 1}$

Answer 2

Answer:

5n25

n−1

÷(5

n−1

×25

n−1

)

It can be written as

=

 

5n×

 

25

n−1

×

 

(5

n−1

×25

n−1

)

1

By further calculation

=5n

5n−1

1

So we get

=5

n–n+1

=51