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1. Given, x = t + 1 and y = t + 2t. (a) Find points (x, y) on the parametric curve where the t ...
1. Given, x = t² + 1 and y = t² + 2t. (a) Find points (x, y) on the parametric curve where the tangent lines are vertical. (b) Find points (x, y) on the parametric curve where the tangent lines are horizontal. (c) Find the interval(s) where the parametric curve is concave upward and/or downward.