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the circle whose eq. are x2 +y2 +c2=2ax and x2 +y2 +c2-2by=0 will touch another externally if

a. 1/b2 +1/c2 =1/a2

b. 1/b2 =1/c2 +1/a2

c. 1/a2 +1/b2 =1/c2

4 years ago


Answers : (3)


Answer is c)

4 years ago


4 years ago

is it right or not?

4 years ago

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