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The coefficients of three consecutive terms in the expansion of (1+x)^n are 165, 330 and 462. Then the value of n is? What is our role in helping others find their voice? If the theory of Gravity is true, then why don t the planets rotation around the Sun fall towards the Sun? Rectangular to polar equation question.? Use the arc length formula to find the length of the curve y=2x-5, -1≤ x ≤ 2. Please help thanks!?