Lets call the above DETERMINANT D.

D =0

one of the roots of D is x= -9.

find the other roots.

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Guys,

after solving the determinant I get,

x³ - 67x -126 = 0

After this I dont know how to proceed..!! PLZ help

Problem:

(tdt)/(4-t^4)^(1/2)

Attempt:

I want the derivate of whatever i make u equal to, to equal something outside of u therefore I will factorize the denominator to equal -(-2+t^2)(2+t^2) and make u equal to (2+t^2) so that du=2tdt

Balance the equation so that one side is equal to the numerator

(1/2)du=tdt

Now I have

1/2 = 1/(-(-2+t^2)u)^1/2

How do I apply this elementary integral in this situation?:

1/(a^2-x^2)^1/2 dx = sin^-1(x/a) + C

I don't know what to do with the u in

1/(-(-2+t^2)u)^1/2



If it helps the final answer is supposed to be:

(1/2)sin^-1(t^2/2)

prove the above

prove the above

Two runners start simultaneously from the same point on a

circular 200-m track and run in same directions. One runs at a

constant speed of 6.20 m/s, and the other runs at a constant speed

of 5.50 m/s.



when will the fast one overtake the slower one?



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this may be an easy problem, but I am getting confused... as far as I have analyzed.. the distance traveled for overtaking is same and the time taken for overtaking is different....



If this is the correct analysis.. then I am not able to proceed further... can yiu help me to proceed??



Thanxx..!!!

See Wat happens is that Fe$O4 Combines with NO gas in "Brown Ring test"



forming [Fe(H2O)5NO]SO4



Fe+2(3d6).....four unpaired electrons

With NO(nitrosyl)



thereafter "Charge transfer" takes place

NO transfers its one unpaired electron to Fe(+2)

NO becomes NO(+1) and Fe becomes Fe(+1)..3d7....only three unpaired electron















[Note.......Wenever NO with Fe, NO is NO(+1)]