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Equation x^(2) +k(1)y^(2) +2k(2)y = a^(2...

Equation `x^(2) +k_(1)y^(2) +2k_(2)y = a^(2)` represents a pair of perpendicular straight lines if

A

(a) `k_(1)=1,k_(2)=a`

B

(b) `k_(1)=1,k_(2)=-a`

C

(c) `k_(1)=-1,k_(2)=+-a`

D

(d) `k_(1)=1,k_(2)=+-a`

Text Solution

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The correct Answer is:
C
NA
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