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दर्शाइए कि वृत्त x^2+y^2-2x-4y=0 और x^...

दर्शाइए कि वृत्त
`x^2+y^2-2x-4y=0`
और `x^2+y^2-8y-4=0`
एक - दूसरे को अन्तः स्पर्श करते है ।

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