Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §3.4 Graphs, #1 · Calculus · Curve sketching

Find the pulse rate when heartbeats are … second or two dark…

Find the pulse rate when heartbeats are $\frac{1}{2}$ second or two dark lines or $x$ seconds apart.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §3.4 Graphs, #1

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