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Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

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38 In t reduction to <strong>Analysis</strong> [Ch. I<br />

Example 3. The function /(jc)=j-y has a discont<strong>in</strong>uity<br />

at * = 0. Indeed, here,<br />

and<br />

/ ( + 0)= lim 5!!L ==+ i<br />

/(_0)= lim<br />

jc-*-o<br />

x<br />

of the first k<strong>in</strong>d<br />

Example 4. The iunction y = E(x), where E(x) denotes the <strong>in</strong>tegral part<br />

of the number x [i.e., E (x) is an <strong>in</strong>teger that satisfies the equality x = E(x) + q.<br />

where 0

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