Hi all

I hope every one is ok ....

A ) The velocity of this 4 particles at any time t ,its accleration at any time is .

1 ) 1/secx

2)2/cosx

3) 1/tanx

4)1/sec2x

my answer is :

1) 1/cosx

2)2/-sinx

3)1/sex2x

4)1/cos2x

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B) suppose that u is a differntiable function of x and that u(2) = 2 ud(2) =3

the derivaives of (2 + u ) respect with x . at x = 2 is ......(4)........

c) suppose that u is a differntiable function of x and that u(2) = 2 ud(2) =3

the derivaives of (2 + u ) respect with x . at x = 3 is ......(5)........

I want your help .