The Euclidean space p2 is metric space . Specially R' (real line) R2( the complex plane) etc are metric .
Let X be a metric space ,then show that
(a) A subset F of X is closed iff Fc is open .
(b) A subset E of X is open iff Ec is closed .
Theorem:
(i) For any collection {Gi} of open sets YGi is open .
(ii) For any collection {Fi} of closed set nFi is closed .
(iii) For any finite collection G1 , G2 ......Gn of open sets nniGi is open .
(iv) For any finite collection F1,F2...Fn of closed sets uxiFi is closed.
Let the position vector of a stone at time,t be given as r(t)=cosh (t^2-1)I+ sinh(1-t)j+Bt^2k
Assume that the position vector is Normal to the acceleration vector.
Find the value of B at Time t=5seconds
A particle moves in space so that at time t its position is stated as x=2t+3, y=t2+3t, z=t3+2t2 Find the components of its velocity and acceleration when t=1
Find the general solution of these differential equations.
3) dy/dx = cosx/y 4) dy/dx = 4x/ey 5) x+4ydy/dx = 0
When do you say that metric space (X,d) is complete ? Give an example of a complete metric space