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JEE MATHEMATICS MCQ: 3D GEOMETRY SYSTEM

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Application +4 | -1
The equation of the sphere whose centre has the position vector (3i^+6j^−4k^)(3 \hat{i}+6 \hat{j}-4 \hat{k}) and which touches the plane r⋅(2i^−2j^−k^)=10{r} \cdot(2 \hat{i}-2 \hat{j}-\hat{k})=10 is
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Correct option: A
∣r−(3i^+6j^−4k^)∣=4|{r}-(3 \hat{i}+6 \hat{j}-4 \hat{k})|=4
Option A (∣r−(3i^+6j^−4k^)∣=4|{r}-(3 \hat{i}+6 \hat{j}-4 \hat{k})|=4) is correct because it represents the equation of the sphere with the given center and radius.

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