Given a variable, x, the compound ineaquality representing the range from a to b inclusive of the variable is given by
![a\leqx\leqb](https://tex.z-dn.net/?f=a%5Cleqx%5Cleqb)
where a is the least value and b is the greatest value.
Thus, given a variable f, representing the frequencies for the three octaves of a <span>typical acoustic guitar.
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Where the range of the frequencies is between 82.4 Hertz and 659.2 Hertz inclusive.
The complex inequality, representing <span>the range of frequencies for a guitar tuned to "concert pitch"</span> is given by