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a calculus-1 Question. Thank You. What is the slope of the tangent line to the graph y = sech²(e) at x = 0 ? 8(e² - e4) (a) (e² + 1)³ (b) -4(e² - 1) (e² + 1)² (c) 2(e² + 1)² (e4-e2)3 2e + e³ (d) (e² - 1)³ (e4-e²) (e) 8