Mr. Dey took out Rs.5000 from his bank. He took 40 notes of 50 Rupees each and the remaining amount in 20 Rupees notes. How many
2 answers:
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Answer:
C.
Step-by-step explanation:
Let's find the inverse of each of the given options.
Option A:
To find , replace 'x' with 'y' and 'y' with 'x'. This gives,
Rewrite in terms of 'y'. This gives,
The given function
So, option A is incorrect.
Option B:
To find , replace 'x' with 'y' and 'y' with 'x'. This gives,
Rewrite in terms of 'y'. This gives,
The given function
So, option B is incorrect.
Option C:
To find , replace 'x' with 'y' and 'y' with 'x'. This gives,
Rewrite in terms of 'y'. This gives,
The given function
So, option C is correct.
Option D:
To find , replace 'x' with 'y' and 'y' with 'x'. This gives,
Rewrite in terms of 'y'. This gives,
The given function
So, option D is incorrect.
Therefore, only option C is correct.