Question Details

If (5.55)x=(0.555)y=1000, then the value of 1x-1y is

Options

A

3

B

1

C

1/3

D

2/3

Show Answer

Correct Answer :

Option C

1/3

Solution :

Correct Answer: 1/3 (Option 3)

We are given:
(5.55)x=1000 and (0.555)y=1000

Taking the x-th root on both sides of the first equation:
5.55=10001x=1031x=103x

Similarly, taking the y-th root on both sides of the second equation:
0.555=10001y=1031y=103y

Now, divide the first expression by the second:
5.550.555=103x103y

Since 5.550.555=10, we have:
10=103x-3y

Comparing the exponents on both sides (since the bases are equal to 10):
1=31x-1y

Dividing by 3 on both sides yields:
1x-1y=13

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