[" 8.If the tangents on the ellipse "4x^...

[" 8.If the tangents on the ellipse "4x^(2)+y^(2)=8" at "],[" the points "(1,2)" and "(a,b)" are perpendicular "],[" to each other,then "a^(2)" is equal to "],[[" (a) "(128)/(17)," (b) "(64)/(17)," (c) "(4)/(17)," (d) "(2)/(17)]]

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