Consider the problem of determining, in an Oxy orthogonal Cartesian system, the equation of the straight r tangent to circumference 4 3 C:x² + y? = 5 P. at the point P = (-1,2) of this circle. The straight will have an equation of form -3 2 r: y – 2 = m(x + 1) Determine the value of m for which the line will meet a circumference at a single point, that is, it will be tangent to the circumference at point P. -3 3.

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