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The operation @ is defined for all distinct and nonzero a and b by
- a)9
- b)15/2
- c)15/8
- d)1
- e)-15/8
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The operation @ is defined for all distinct and nonzero a and b bya)9b...
Given:
To find: x = ?
Approach:
- We’ll first evaluate the expression for 3@x
- Then, we’ll evaluate the expression for 2@(3@x), and finally, will equate the resulting expression with 4. We’ll thus get an equation in x, upon solving which, we’ll get the value of x.
- Since we’re given that 2@(3@x) = 4, we can write:
Looking at the answer choices, we see that the correct answer is Option D
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