(c) b = rq + a, where 0

If a gt b, " then " (a)/(c) lt (b)/(c) for all a, b and c in R , where c lt 0 . (True /False)

If vec a xxvec b = vec c, vec b xxvec c = vec a, where vec c! = 0

If r. a = r.b = r.c = 0 where a,b,c are noncoplannar, then

If a, b, c are in AP or GP ot HP where a>0, b>0, c>0 then prove that b^2> or = or < ac .

The straight line a x+b y+c=0 , where a b c!=0, will pass through the first quadrant if (a) a c >0,b c >0 (b) ac >0 or b c 0 or a c >0 (d) a c<0 or b c<0

The straight line a x+b y+c=0 , where a b c!=0, will pass through the first quadrant if (a) a c >0,b c >0 (b) ac >0 or b c 0 or a c >0 (d) a c<0 or b c<0