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Two mappings f : R to R and g : R to R a...

Two mappings `f : R to R` and `g : R to R` are defined in the following ways :
`f(x)={{:("0 when x is rational"),("1 where x is irrational"):}, g(x)={{:(-"1 when x is rational"),("0 when x is irrational"):}`,
then the value of `(gof)(e )+(fog)(pi)` is

A

`-1`

B

1

C

0

D

2

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2007-MULTIPLE CHOICE QUESTIONS
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  3. Two mappings f : R to R and g : R to R are defined in the following wa...

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  8. The value of int (1)/(e^(x)+e^(-x))dx is

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  15. The value of the integral int(1)^(e )(log x)^(2)dx is

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  17. If (m, n) represent respectively the order and degree of the differnti...

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  18. The solution of the differential euation (dy)/(dx)=(x-y)/(x+y) is C...

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  19. The general solution of the equation ydx+(x+cos y)dy=0 is

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