Question
If f(x) satisfies the relation 2f(x) +f(1-x) = x2 for all real x , then f(x) is
The correct answer is:
We have given that
2f(x) +f(1-x) = x2 - - -- - - - - -(i)
We have to find the value of f(x)
By replacing x by (1-x) in equation (i)we get,
2f(1-x) + f(x) = (1-x)2
2f(1-x) + f(x) = 1 + x2 – 2x - - - - - -(ii)
Multiplying the equation(i) by 2 we get,
4f(x) + 2f(1-x) = 2x2 - - - - - - (iii)
Subtracting equation (ii) from (iii)
3f(x) = x2 + 2x -1
So,
Therefore option (b) is correct.
We have to find the value of f(x)
By replacing x by (1-x) in equation (i)we get,
Multiplying the equation(i) by 2 we get,
Subtracting equation (ii) from (iii)
So,
Therefore option (b) is correct.
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X |
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Y |
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Y |
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