1.

If e_(1) and e_(2)are theeccentricites of (x^(2))/(a^(2))+(y^(2))/(b^(2))=1and (x^(2))/(b^(2))+(y^(2))/(a^(2))=1respectively then

Answer»

`e_(1)=e_(2)`
`e_(1)e_(2)=1`
`(1)/(e_(1)^(2))+(1)/(e_(2)^(2))=1`
`(1)/(e_(1))+(1)/(e_(2))=1`

ANSWER :C


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