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If then value of then value of is:

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answer is A.

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Detailed Solution

Concept- In order to obtain the value of K as it is asked in the question, we just need to solve the provided equation in terms of K, then cancel out the similar terms from the LHS and RHS.
Given,
Question Image

Or we can simplified the above expression
Like,

On canceling out the like terms we get a simplified expression as written below.

Now canceling the b3 we get,

Now multiplying

both side we get the value of

So, the correct answer is "

".
Hence, the correct option is 1.

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