Math Homework Help - Tagged with Proof

Suppose that v and w are vectors in a vector space V . Suppose that S is a subspace of V . Let T be the subspace spanned by v and S. Let U be...

Posted by user6975354 March 21, 2013 at 5:00 PM via web. 2 educator answers. »

True/False. If f is integrable on [a,b], then there exists a number x in the open interval (a,b) such that the integral from a to x of f is...

Posted by redeagle88 March 10, 2013 at 10:56 PM via web. 1 educator answer. »

True/False. If f(x)g(x)=x, then it is possible that f and g are differentiable and f(0)=g(0)=0.  If true, explain reasoning.  If false, give...

Posted by redeagle88 March 10, 2013 at 3:15 PM via web. 2 educator answers. »

Prove that the x-coordinate of the fifth apex of a regular hexahedron is X5 = (2/3)(x4 + x3 + x2) – x1In this case, the hexahedron is made...

Posted by etotheeyepi November 17, 2012 at 3:08 AM via web. Be the first to answer. »

Prove that (cA)^-1=(1/c)A^-1If A is an invertible matrix and c is a nonzero scalar, then cA is an invertible matrix and the above equation is...

Posted by emather7 November 11, 2012 at 12:01 AM via web. 1 educator answer. »

tan2 x+1=sec2 x

Posted by titomath November 10, 2012 at 10:04 AM via web. 2 educator answers. »

Prove that 1 + sin x - cos x = 2 sin(x/2)[cos(x/2) + sin(x/2)].

Posted by stevesam93 November 10, 2012 at 8:52 AM via web. 2 educator answers. »

Using the identity for cos (A+B), prove that cos x= 1- 2(sin x/2)^2.

Posted by luckyb0y1314 November 10, 2012 at 8:48 AM via web. 2 educator answers. »

If A is any matrix , to what is tr(AA^t) equal?Where tr denotes the trace of a matrix.Which is the sum of the entries on its main diagonal. If...

Posted by emather7 November 4, 2012 at 11:44 PM via web. 1 educator answer. »

Suppose that f is uniformly continuous on [a,b] and uniformly continuous on [b,c]. Prove that f is uniformly continuous on [a,c].

Posted by texasgirlfirst October 22, 2012 at 1:52 PM via web. Be the first to answer. »