If the tangents on the ellipse 4x2 + y2 = 8 at the points (1, 2) and (a, b) are perpendicular to each other, then a2 is equal to :
JEE · Math · previous-year question
- A.$${{2} \over {17}}$$
- B.$${{64} \over {17}}$$
- C.$${{128} \over {17}}$$
- D.$${{4} \over {17}}$$
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