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Q.

Let g(x)=1+x[x] and f(x)=1,x<0;f(x)=0,x=0;f(x)=1,x>0Then for all x , f(g (x ))   equals

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a

x

b

1

c

f(x)

d

g(x)

answer is B.

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Detailed Solution

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g(x)=(1+ fractional part of x) > 1Now, f (g(x)) = –1, when g(x) < 0 = 0, when g(x) = 0
=1 when g(x)>0f(g(x))=1(g(x)>1)

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