Let a be a non-zero rational number and b be an irrational number. Is a×b rational or irrational? Choose 1 answer:(A) Rational(B) Irrational(C) It can be either rational or irrational
Q. Let a be a non-zero rational number and b be an irrational number. Is a×b rational or irrational? Choose 1 answer:(A) Rational(B) Irrational(C) It can be either rational or irrational
Definition of Rational and Irrational Numbers: Let's define what a rational and an irrational number is. A rational number is any number that can be expressed as the quotient or fractionqp of two integers, with the denominator q not equal to zero. An irrational number is a number that cannot be expressed as a simple fraction - it's decimal goes on forever without repeating.
Representation of a as a Rational Number: Since a is a non-zero rational number, it can be written in the form qp, where p and q are integers and q is not zero.
Representation of b as an Irrational Number: Since b is an irrational number, it cannot be written in the form of a simple fraction, and its decimal representation is non-repeating and non-terminating.
Multiplication of Rational and Irrational Numbers: When we multiply a rational number by an irrational number, the result is an irrational number. This is because the non-repeating, non-terminating decimal of the irrational number cannot be canceled out or simplified by multiplication with a rational number.
Product of and is Irrational: Therefore, the product is an irrational number, since a non-zero rational number (which has a terminating or repeating decimal representation) cannot turn the non-terminating, non-repeating decimal of an irrational number into a terminating or repeating decimal.
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