What is the condition of tangency of ellipse and hyperbola?
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for y2=4ax condition is c=a/m
for y2=-4ax condition is c=-a/m
for x2=4ay condition is c=-am2
for x2=-4ay condition is c=am2
for ellipse it is c2=a2m2+b2
for hyperbola it is c2=a2m2-b2
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