Moderate -0.5 This is a verification question requiring substitution of given values into a formula to check a result. It involves parametric tangent properties but requires no derivation or problem-solving—just computational verification of a provided relationship, making it easier than average.
13 Substitute appropriate values of \(t _ { 1 }\) and \(t _ { 2 }\) to verify that \(t _ { 1 } t _ { 2 }\) gives the correct value for the \(y\)-coordinate of the point of intersection of the tangents at the points A and B in Fig. \(\mathbf { C 1 . }\)
13 Substitute appropriate values of $t _ { 1 }$ and $t _ { 2 }$ to verify that $t _ { 1 } t _ { 2 }$ gives the correct value for the $y$-coordinate of the point of intersection of the tangents at the points A and B in Fig. $\mathbf { C 1 . }$
\hfill \mbox{\textit{OCR MEI Paper 3 2024 Q13 [1]}}