No. An irrational number is a number that neither terminates nor repeats. Since 1 terminates, it is called a rationalnumber.
No. An irrational number is a number that is not rational. Rational numbers are those who can be defined as the division of two integer numbers. As 1 is 1/1, it is a rational number, so, it's not irrational.
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A negative irrational number can be thought of as an irrational number multiplied by -1, or an irrational number with a minus sign in front of it.
Any irrational number added to 0.5 will produce an irrational number.
Not always. For example sqrt(2) and 1/sqrt(2) are both irrational, but their product is the rational number 1.
It is a rational number.
Can be irrational or rational.1 [rational] * sqrt(2) [irrational] = sqrt(2) [irrational]0 [rational] * sqrt(2) [irrational] = 0 [rational]