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Hi there; The sum of n terms of the sequence; 3,9,15,21,..... is 7500. Determine the value of n. A quadratic curve passes through the points

Hi there;

  1. The sum of n terms of the sequence; 3,9,15,21,..... is 7500. Determine the value of n.
  2. A quadratic curve passes through the points ( -2, 0 ) and ( 1, 0 ). Find the equation of the curve in the form of y = a x 2 + b x + c , where a, b and c are constants.
  3. Make d the subject of the formula in P = 0.5 m n 2 - qd 2/n.

Than you

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