Match List-I with List-II
| List-I | List-II |
|---|---|
| (A) The minimum value of f(x) = | (I) 4 |
| (B) The maximum value of f(x) = | (II) 10 |
| (C) The minimum value of f(x) = | (III) 3 |
| (D) The maximum value of f(x) = | (IV) 5 |
Choose the correct answer from the options given below:
Correct Answer :
(A) - (III), (B) - (I), (C) - (IV), (D) - (II)
Solution :
The correct answer is (A) - (III), (B) - (I), (C) - (IV), (D) - (II).
To find the correct match for each function, let us evaluate the minimum or maximum value of each function step-by-step.
Step 1: Evaluate (A)
The given function is:
Since the square of any real number is always non-negative, we have:
Adding 3 to both sides:
Thus, the minimum value of f(x) is 3, which occurs when (i.e., ).
Therefore, (A) matches with (III).
Step 2: Evaluate (B)
The given function is:
Since the absolute value is always non-negative:
Multiplying by -1 reverses the inequality:
Adding 4 to both sides:
Thus, the maximum value of f(x) is 4, which occurs when .
Therefore, (B) matches with (I).
Step 3: Evaluate (C)
The given function is:
We know that the sine function oscillates between -1 and 1 for any real argument:
Adding 6 to all parts of the inequality:
Thus, the minimum value of f(x) is 5.
Therefore, (C) matches with (IV).
Step 4: Evaluate (D)
The given function is:
Since the square term is non-negative:
Multiplying by -1:
Adding 10 to both sides:
Thus, the maximum value of f(x) is 10, which occurs when .
Therefore, (D) matches with (II).
Combining all the results:
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