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<tspan x="113" y="169">a</tspan>
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<tspan x="132" y="35">Interval [a, c] where the </tspan>
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<tspan x="132" y="61">values (above the x-axis).</tspan>
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<tspan x="160.462" y="239.362015">Interval [c,b] where the </tspan>
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<tspan x="151.629" y="265.362015">values (below the x-axis)</tspan>
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<tspan x="153" y="169">c</tspan>
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<tspan x="134" y="141">+</tspan>
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<tspan x="210" y="174">–</tspan>
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<tspan x="256" y="169">b</tspan>
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<tspan x="45.5" y="111">y=f(x)</tspan>
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