No. If you write an irrational number as a decimal, it will have an infinite number of decimal digits that don't repeat periodically.
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Oh, dude, 1.73 is not an irrational number. It's actually a rational number because it can be expressed as a fraction, like 173/100. So, no need to stress about this one, it's all good.
At least one of the factors has to be irrational.* An irrational number times ANY number (except zero) is irrational. * The product of two irrational numbers can be either rational or irrational.
it is a rational number but 4.121314..... is an irrational no
An irrational number.
It is an irrational number.
Any, and every, irrational number will do.