Find an upper and lower bound for the reciprocal of the modulus ofif
Out of all the the ways to break modulus how do I know which structure of the triangle inequalities to use?
(z^2-2)|\geq|z^2-3||z^2-2|=||z|^2-|3||*||z^2|-|2||)
Why am I getting the same value for my upper and lower bounds?
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Find an upper and lower bound for the reciprocal of the modulus of
Out of all the the ways to break modulus how do I know which structure of the triangle inequalities to use?
Why am I getting the same value for my upper and lower bounds?
It is not necessary to do that. A is an upper bound for 1/f(x) if and only if 1/A is a lower bound (not 0) for f(x) and B is a lower bound for 1/f(x) if and only if 1/B is an upper bound for f(x).
I don't understand since the bounds are