Solving the Floor Function Equation

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SUMMARY

The equation $\mid x \mid+\sqrt{\lfloor x \rfloor+\sqrt{1+\{x\}}} = 1$ has been analyzed with the conclusion that $x = 0$ is a valid solution. The discussion establishes that for values of $x$ in the range of -1 to 0, the absolute value simplifies to $-x$, the floor function $\lfloor x \rfloor$ equals -1, and the fractional part $\{x\}$ is expressed as $x + 1$. This leads to two additional solutions, one straightforward and one more complex, confirming the behavior of the floor function in this context.

PREREQUISITES
  • Understanding of the floor function, denoted as $\lfloor x \rfloor$
  • Familiarity with the absolute value function, $\mid x \mid$
  • Knowledge of the fractional part function, $\{x\}$
  • Basic algebraic manipulation skills
NEXT STEPS
  • Explore the properties of the floor function in real analysis
  • Study the implications of absolute value in piecewise functions
  • Investigate the behavior of fractional parts in various mathematical contexts
  • Learn about solving inequalities involving square roots and absolute values
USEFUL FOR

Mathematicians, students studying real analysis, and anyone interested in solving complex equations involving floor and fractional functions.

juantheron
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Solve the equation $\mid x \mid+\sqrt{\lfloor x \rfloor+\sqrt{1+\{x\}}} = 1$

where $\lfloor x \rfloor = $ floor function
 
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Obviously, |x| <= 1, and x = 0 is one solution. Further, {x} >= 0 for all x, so x cannot be positive. If -1 <= x < 0, then |x| = -x, floor(x) = -1 and {x} = x + 1. This gives an equation that has two solutions: one simple and one complicated.
 

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