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Question

The length of the tangent from the point (3,5) to the ellipse 4x2+3y2=12, is given by

A
1217
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B
1233
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C
1237
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D
1219
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Solution

The correct option is B 1233
equation of ellipse
4x2+3y2=12
or x23+y24=1
or x23+y241=0
S=x23+y241
then length of tangent = S1
where S1= value of S ar (x1,y1)
length = 323+(5)241
=3+2S41
=(3.4)+2S44
=334
=1233
wrong option

1067962_1137791_ans_67c09d7667634e7d8b010a71645cbfb3.JPG

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