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The area bounded by the x-axis, the curv...

The area bounded by the x-axis, the curve `y=f(x)` and the lines `x=a ,x=b` is equal to `sqrt(b^2-a^2)` for `AAb in R` where `f(x)geq0AAx in [a ,b]dot` Then `f(x)` may be equal to `x/(sqrt(x^2-a^2))` (2) `a/(sqrt(x^2-a^2))` (3) `b/(sqrt(x^2-a^2))` `a/(sqrt(x^2+a^2))` (5) `x/(sqrt(x^2+a^2))`

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