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If the line ax−by+2=0 belongs to both the family of lines (3+2λ)x+(1−3λ)y−1+14λ=0 and (2+t)x+(2t−1)y+3t+1=0.If f(x)=0 is a quadratic equation whose roots are ′a′ and ′b′ then number of real roots of f(|x|)=0 is |
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Answer» If the line ax−by+2=0 belongs to both the family of lines (3+2λ)x+(1−3λ)y−1+14λ=0 and (2+t)x+(2t−1)y+3t+1=0. If f(x)=0 is a quadratic equation whose roots are ′a′ and ′b′ then number of real roots of f(|x|)=0 is |
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