Hi, I was wondering what values of a and b such that the entries for this matrix are all non negative? What I did was: we know that 4b-1<0 so we must have 4b=>0 and b+2a=>0 and 8a+1=>0 then we get 0<=b<1/4 and a=>-1/8 and a=>b/-2 we can find an interval for b but what about a? cheers
Follow Math Help Forum on Facebook and Google+
1. Independently of we have non negative. 2. are non negative iff i.e. . 3. For , is non negative iff . 4. For , is non negative iff i.e. . 5. For and , is non negative iff . So, the solution is the region of the plane:
View Tag Cloud