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If a continuous function `f` defined on the real line `R ,` assumes positive and negative values in `R` then the equation `f(x)=0` has a root in `R` . For example, if it is known that a continuous function `f` on `R` is positive at some point and its minimum value is negative then the equation `f(x)=0` has a root in `Rdot` Consider `f(x)=k e^x-x` for all real `x` where `k` is a real constant The line `y=x` meets `y=k e^x` for `klt=0` at no point (b) one point two points (d) more than two points

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If a continuous function f defined on the real line R assume positive and negative values in R, then the equation f(x)=0 has a root in R. For example, if it is known that a continuous function f on R is positive at some point and its minimum value is negative, then the equation f(x)=0 has a root in R. Consider f(x)= ke^(x)-x , for all real x where k is a real constant. The positive value of k for which ke^(x)-x=0 has only one root is

If a continuous function f defined on the real line R assume positive and negative values in R, then the equation f(x)=0 has a root in R. For example, if it is known that a continuous function f on R is positive at some point and its minimum value is negative, then the equation f(x)=0 has a root in R. Consider f(x)= ke^(x)-x , for all real x where k is a real constant. The line y=x meets y=ke^(x) for k le 0 at

If a continuous function f defined on the real line R assume positive and negative values in R, then the equation f(x)=0 has a root in R. For example, if it is known that a continuous function f on R is positive at some point and its minimum value is negative, then the equation f(x)=0 has a root in R. Consider f(x)= ke^(x)-x , for all real x where k is a real constant. The line y=x meets y=ke^(x) for k le 0 at

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If a continuous function f defined on the real line R assume positive and negative values in R, then the equation f(x)=0 has a root in R. For example, if it is known that a continuous function f on R is positive at some point and its minimum value is negative, then the equation f(x)=0 has a root in R. Consider f(x)= ke^(x)-x , for all real x where k is a real constant. For k > 0, the set of all values of k for which y=ke^(x)-x=0 has only one root is

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