For every pair of continuous functions f ,   g   : 0 ,   1 → R such that max ⁡ f…

For every pair of continuous functions f, g :0, 1R such that maxfx:x 0, 1=max{gx :x 0, 1},then the correct statement (s) is (are)
  1. fc2+3fc=gc2+3gc for some c 0, 1
  2. fc2+fc=gc2+3gc for some c 0, 1
  3. fc2+3fc=gc2+gc for some c 0, 1
  4. fc2=gc2 for some c 0, 1

Solution

Let fx and gx achieve their maximum value at x1 and x2 respectively
hx=fx-gx
hx1=fx1-gx1 0
h x2=fx2-gx2 0
hc=0 where c 0, 1fc=gc.

Asked in: JEE Advanced 2014 (Paper 1)

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