Question Details

If m and M are respectively minimum and maximum values of f(x) = |2- |x||, −3 ≤ x ≤ 3, then


Options

A

m = 0 and M = 2

B

m = 1 and M = 2


C

m = 0 and M = 4


D

m = 0 and M = 1


Show Answer

Correct Answer :

Option A

m = 0 and M = 2

Solution :

The correct option is m = 0 and M = 2.

Let us analyze the function fx=2-x defined on the closed interval -3x3 to find its minimum value (m) and maximum value (M).

Step 1: Understand the absolute value components
The variable x lies in the interval -3,3. Therefore, the absolute value x ranges from a minimum of 0 to a maximum of 3:
0x3

Step 2: Find the minimum value (m)
Because fx is defined as an absolute value expression, fx=2-x, its value can never be negative. Thus, the absolute minimum possible value for fx is 0.
This minimum value of 0 is achieved when the inner term is equal to 0:
2-x=0x=2
Since x=±2 lie within the given interval -3,3, we have:
m=0

Step 3: Find the maximum value (M)
Let us evaluate fx at the critical points and the boundaries of the interval -3,3:
1. At x=0 (where x is minimized):
f0=2-0=2
2. At the boundaries x=±3 (where x is maximized):
f±3=2-3=-1=1
3. At the points where the function is zero, x=±2:
f±2=0

Comparing these values, the maximum value of fx on the interval -3,3 is:
M=2

Conclusion:
The minimum value is m=0 and the maximum value is M=2.

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