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Question

The graph of the function y=f(x) is symmetrical about the line x=2. Then,

A
f(x+2)=f(x2)
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B
f(2+x)=f(2x)
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C
f(x)=f(x)
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D
f(x)=f(x)
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Solution

The correct option is B f(2+x)=f(2x)
If a function h(x) is symmetrical about yaxis(i.e.x=0), then we can write :
h(x)=h(x)
It can also be written as :
h(0+x)=h(0x)
a function f(x) which is symmetrical about x=2, can be written as:
f(2+x)=f(2x)

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