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Let 0 ≤ a ≤ x ≤ 100 and f(x) = |x − a| + |x − 100| + |x − a − 50|.Then the maximum value of f(x) becomes 100 when a is equal to
  • a)
    25
  • b)
    0
  • c)
    100
  • d)
    50
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Let 0 ≤ a ≤ x ≤ 100 and f(x) = |x − a| + |x − 100...
x>=a, so |x-a| = x-a
x<100, so |x-100| = 100-x
f(x) = (x-a) + (100-x) + |x-a-50| =100
or, |x-a-50| = a

 
From the graph we can can see that when x=a then
|x-a-50|=a
or, a= 50
Similarly when x=a+100
|x-a-50|=a
or, a= 50
So value of a is 50 when f(x) is 100.
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Let 0 ≤ a ≤ x ≤ 100 and f(x) = |x − a| + |x − 100...
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Let 0 ≤ a ≤ x ≤ 100 and f(x) = |x − a| + |x − 100| + |x − a − 50|.Then the maximum value of f(x) becomes 100 when a is equal toa)25b)0c)100d)50Correct answer is option 'D'. Can you explain this answer?
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