a , b, c 3 vectors such that |a| = 3 |b| = 4, |c| = 5. each one perp to sum of other 2 .  find |a+B+c|....???

 

pl help.

5 th step???

solution of differential eqn dy/dx - ky = 0,  y(0) = 1 approaches 0 when x tends to infinity.  find value of K.

 

whats the ans??

 

another thing. u can have many diff correct ans for indefenite integral rite so will the teachers award marks if its diff from in value point???

i found that these are imp Q .

 

i have worked them out but as ans key not available i dont know if its right. i am sure of some answers and unsure of these posted below.

 

so tell me if they are rite. i don't need solutions just if they r rite if wrong then only post the soln.

 

1) integrate 0 ti pi xtanx / (sec x + tan x)

 

ans:  pi/2 [2-pi]

 

2) differential eqn : 1-x^2 dy / dx - xy = x^2

 

ans: -x sqrt(1-x^2)  + sin-1 x.

 

3) pls work this out.

 

    2 bags A and B have 4white, 3 black balls and 2 W 2B balls rep. frm bag A 2 balls transferred to B. probability of drawing 2 white balls frm B

 

 

 

 

 a die is rolled n times find value of n if p(getting 1 is ) = 91/216

 

ans: 3

 

i am not getting it. so pls tell me/

| x-1| + |2x-3| = |3x-4|

 

what are the real values of Z satisfing this?

pg 582 eg 37

 

why is p(A|B1) = 0.9 *0.9.  shdn't it be just 0.9??

 

pg 584 14 and 13.  how shd u do??

 

pls help me.

1)1 / ( sqrt ( sin^3 x sin(x+a))

 

2) integrate 0 to pi/4  sin x + cos x / (9 + 16 sin 2x)

 

3) integrate 0 to pi xtanx / (sec x + tan x)

 

4) integrate 0 to pi/2 log ( (4 + 3 sin x) / (4 + 3 cos x))

 

5) -5 to 5     | x + 2 | 

 

6) e^(2x) sin x