Maths Puzzle Algebra

Solve the equation for the specified variable.

1/a + 1/b = c; for c.

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Other Question

Solve each inequality. State the solution set using interval notation and graph the solution set.
1) 4x^2 - 8x > 0

2) 3x - x^2 > 0 Consider the general quadratic function f(x) = a(x-h)^2 + k, where a, h and k are real constants and (a) does not equal 0. Where does the graph of f(x) cross the y-axis? And if the vertex of the graph of f(x) is located at the point (2,3), how many x-intercepts are possible for the graph?