["If "c" is small in comparison with I then"],[((l)/(l+c))^((1)/(2))+((l)/(l-c))^((1)/(2))=]

If c is small in comparision with l then ((l)/(l+c))^((1)/(2))+((l)/(l-c))^((1)/(2))=

If 'c' is small in comparison with l then ((l)/(l+c))^(1//2) + ((l)/(l-c))^(1//2) =

If 'c' is small in comparison with l then ((l)/(l+c))^(1//2) + ((l)/(l-c))^(1//2) =

If L_(1)&L_(2) are the lengths of the segments of any focal chord of the parabola y^(2)=x, then (a) (1)/(L_(1))+(1)/(L_(2))=2( b) (1)/(L_(1))+(1)/(L_(2))=(1)/(2)(c)(1)/(L_(1))+(1)/(L_(2))=4(d)(1)/(L_(1))+(1)/(L_(2))=(1)/(4)

If (l_(1), m_(1), n_(1)) , (l_(2), m_(2), n_(2)) are D.C's of two lines, then (l_(1)m_(2)-l_(2)m_(1))^2+(m_(1)n_(2)-n_(1)m_(2))^2+(n_(1)l_(2)-n_(2)l_(1))^2+(l_(1)l_(2)+m_(1)m_(2)+n_(1)n_(2))^2=

If (l_(1), m_(1), n_(1)) , (l_(2), m_(2), n_(2)) are D.C's of two lines, then (l_(1)m_(2)-l_(2)m_(1))^2+(m_(1)n_(2)-n_(1)m_(2))^2+(n_(1)l_(2)-n_(2)l_(1))^2+(l_(1)l_(2)+m_(1)m_(2)+n_(1)n_(2))^2=

If (l_(1), m_(1), n_(1)) , (l_(2), m_(2), n_(2)) are D.C's of two lines, then (l_(1)m_(2)-l_(2)m_(1))^2+(m_(1)n_(2)-n_(1)m_(2))^2+(n_(1)l_(2)-n_(2)l_(1))^2+(l_(1)l_(2)+m_(1)m_(2)+n_(1)n_(2))^2=

In a Kater's pendulum the time periods about the knife edges at distance l_(1) and l_(2) from the centre of gravity are t and t+pi is very small. Show that (4 pi^(2)(l_(1)+l_(2)))/(g)=t(t+(2l_(2)tau)/(l_(2)-l_(1)))