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Can someone explain step by step !? How do you solve this question? What are the steps/methods? Find the equation of the line tangent to the graph of f(x) =x^4+2x^2 at the point where f (x)=1? Caesium is more metallic than Lithium justify? It takes 6 seconds for a ball to roll down a hill that is 25 meters long. Find the average velocity using the formula below?