Q.
Range of the function f(x)=log24x+2+2−x is :
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a
(0,∞)
b
12,1
c
[1,2]
d
14,1
answer is B.
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Detailed Solution
f(x)=log242+x+2−x;−2≤x≤22+x+2−x=y4+24−x2=y2y∈[2,22] Range f(x)=log2422,log242f(x) lies between 12,1
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