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<tspan x="296.5" y="174">x</tspan>
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<tspan x="139" y="215">The interval [a, b] has been divided </tspan>
<tspan x="139" y="228">into 6 subintervals of width Δx, </tspan>
<tspan x="139" y="241">whose sum provides a lower </tspan>
<tspan x="139" y="254">approximation of the area of the </tspan>
<tspan x="139" y="267">curvilinear trapezoid.</tspan>
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