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f : R -> R is one-one, onto and differen...

`f : R -> R` is one-one, onto and differentiable and graph of y = f (x) is symmetrical about the point (4, 0), then

A

`f^(-1)(2010) + f^(-1) (-2010) = 8`

B

`int_(-2010)^(2018) f(x) dx = 0`

C

if `f'(-100) gt 0`, then roots of `x^(2) - f'(10) x - f'(10) = 0` may be non-real

D

if `f'(10) = 20`, then f'(-2) = 20

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To solve the problem, we need to analyze the properties of the function \( f \) given that it is one-one, onto, differentiable, and symmetric about the point \( (4, 0) \). ### Step-by-Step Solution: 1. **Understanding Symmetry**: The graph of \( y = f(x) \) is symmetric about the point \( (4, 0) \). This means that for any point \( (x, f(x)) \) on the graph, there exists a corresponding point \( (8 - x, -f(x)) \) that is also on the graph. This gives us the relationship: \[ f(8 - x) = -f(x) \] 2. **Finding Inverse Relationships**: Since \( f \) is one-one and onto, it has an inverse \( f^{-1} \). From the symmetry, we can derive: \[ f^{-1}(y) + f^{-1}(-y) = 8 \] This implies that: \[ f^{-1}(2010) + f^{-1}(-2010) = 8 \] 3. **Using the Inverse Relationship**: Let \( a = f^{-1}(2010) \) and \( b = f^{-1}(-2010) \). From the previous step, we have: \[ a + b = 8 \] 4. **Finding Specific Values**: We can express \( b \) in terms of \( a \): \[ b = 8 - a \] Now, substituting \( a = f^{-1}(2010) \) and \( b = f^{-1}(-2010) \): \[ f^{-1}(2010) + f^{-1}(-2010) = 8 \] 5. **Evaluating the Integral**: We need to evaluate the integral: \[ \int_{-2010}^{2018} f(x) \, dx \] By the symmetry property, we can transform the limits: \[ \int_{-2010}^{2018} f(x) \, dx = \int_{-2010}^{2010} f(x) \, dx + \int_{2010}^{2018} f(x) \, dx \] The first integral can be evaluated using the symmetry property, which will yield zero because the area above the x-axis will cancel out the area below the x-axis. 6. **Analyzing the Derivative**: For the third option, we need to analyze the roots of the equation: \[ x^2 - f'(10)x - f'(10) = 0 \] The discriminant \( D \) of this quadratic equation is given by: \[ D = (f'(10))^2 - 4(-f'(10)) \] Since \( f'(10) > 0 \), the discriminant is positive, indicating that the roots are real. 7. **Final Derivative Evaluation**: For the last option, we have: \[ f'(10) = 20 \] Using the symmetry property again, we can conclude that: \[ f'(-2) = 20 \] ### Conclusion: The correct options based on the analysis are: - \( f^{-1}(2010) + f^{-1}(-2010) = 8 \) - The integral \( \int_{-2010}^{2018} f(x) \, dx = 0 \) - The roots of the quadratic equation are real. - \( f'(-2) = 20 \)
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