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1. |
The normal at the point \[(b{{t}^{2}}_{1},2b{{t}_{1}})\] on a parabola meets the parabola again in the point \[(b{{t}^{2}}_{2},2b{{t}_{2}})\] Then |
A. | \[{{t}_{2}}={{t}_{1}}+\frac{2}{{{t}_{1}}}\] |
B. | \[{{t}_{2}}=-{{t}_{1}}-\frac{2}{{{t}_{1}}}\] |
C. | \[{{t}_{2}}=-{{t}_{1}}+\frac{2}{{{t}_{1}}}\] |
D. | \[{{t}_{2}}={{t}_{1}}-\frac{2}{{{t}_{1}}}\] |
Answer» C. \[{{t}_{2}}=-{{t}_{1}}+\frac{2}{{{t}_{1}}}\] | |