Is that a period for a mathematical function? Which is the image?

If f (x + T) = f (x), t is called a period
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2. Test questions of mathematical function in grade one of senior high school Given that there is a point P (- radical 3, m) on the terminal edge of angle θ, and sin θ = 4 / 4 radical 2 m, the value of cos θ = Tan θ is obtained
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6. A proof of mathematical function Let an implicit function satisfy f (x, y) = f (y, x) = K (k is a constant) It is proved that the explicit function y = f (x) determined by F (x, y) = k must satisfy f (x) = F-1 (x)
7. It is known that the parabola y = MX2 - (3m + 4 / 3) x + 4 intersects the X axis at points a and B, and intersects the Y axis at point C (1) Find the coordinates of three points a, B and C (one of them can be expressed by an algebraic expression containing m) (2) If △ ABC is an isosceles triangle, find the analytical formula of parabola There are four situations in the second question
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