Properties I If `a/b and c/d` are two rational numbers such that `c/d != 0` then `a/b -: c/d` is always a rational number.

(d) (0)/(0) is a rational number.

CLoSURE PROPERTY If (a)/(b) and (c)/(d) are any two rational numbers then (a)/(b)-(c)/(d) is a rational number.

Let x be an irrational number.If a,b,c and d are rational numbers such that (ax+b)/(cx+d) is a rational number,which of the following must be true?

If A & B are two rational numbers and AB, A + B and A -B are rational numbers, then A/B is :

if (log)_a x=b for permissible values of a and x then identify the statements which can be correct. (a) If a and b are two irrational numbers then x can be rational (b) if a is rational and b is irrational, then x can be rational (c) if a is irrational and b is rational, then x can be rational (d) If a and b are two rational numbers then x can be rational .

If (log)_a x=b for permissible values of a and x , then identify the statement(s) which can be correct. (a)If a and b are two irrational numbers, then x can be rational. (b)If a is rational and b is irrational, then x can be rational. (c)If a is irrational and b is rational, then x can be rational. (d)if aa n d b are rational, then x can be rational.

If (a)/(b) and (c)/(d) are two rational numbers then subtracting (c)/(d) and (a)/(b) means adding additive inverse (negative) of (c)/(d) and (a)/(b)

Let a,b inQ"such that"(39sqrt2-5)/(3-sqrt2)=a+bsqrt2, then (A) sqrt((b)/(a)) is a rational number (B) b and a are coprime rational numbers (C) b-a is a composite number (D) sqrt(a+b) is a rational number

For all rational numbers a, b and c, a (b + c) = ab + bc.