Circles and Parallel Lines

Level pending

Let \(X\quad =\quad \left\{ { 3x+4y }|{ { x }^{ 2 } }+{ y }^{ 2 }=14x+6y+6 \right\}\)

If \(X\quad =\quad \left[ a,b \right]\) , find \(b-a\)

  • \(\left[ a,b \right]\) denotes a closed interval
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