If A×B⊆C×D and A×B≠ϕ, then which of the following is/are must be true?
State, Whether the following statements are true of false.
(i) If a<b, then a−c<b−c
(ii) If a>b, then a+c>b+c
(iii) If a<b, then ac>bc
(iv) If a>b, then ac<bc
(v) If a−c>b−d; then a+d>b+c
(vi) If a<b, and c>0, then a−c>b−c where a, b, c and are real numbers and c≠0.
If three homogenous quantities a, b, c are in continued proportion such that ab=bc, then which of the following is true?
A point C is said to be lie between the points A and B if
(a) AC=CB
(b) AC+CB=AB
(c) points A,C and B are collinear.
(d) none of these
If ab = cd , then which of the following is true