2018-10-15 13:26:04 +00:00
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<math display="block"><mrow><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mrow><mo>{</mo><mtable><mtr><mtd columnalign="center"><mrow><mn>1</mn><mo>/</mo><mn>3</mn></mrow></mtd><mtd columnalign="left"><mrow><mtext>if&nbsp;</mtext><mn>0</mn><mo>&leq;</mo><mi>x</mi><mo>&leq;</mo><mn>1</mn><mo>;</mo></mrow></mtd></mtr><mtr><mtd columnalign="center"><mrow><mn>2</mn><mo>/</mo><mn>3</mn></mrow></mtd><mtd columnalign="center"><mrow><mtext>if&nbsp;</mtext><mn>3</mn><mo>&leq;</mo><mi>x</mi><mo>&leq;</mo><mn>4</mn><mo>;</mo></mrow></mtd></mtr><mtr><mtd columnalign="center"><mn>0</mn></mtd><mtd columnalign="left"><mtext>elsewhere.</mtext></mtd></mtr></mtable></mrow></mrow></math>
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