NO it is not irrational, that is to say it IS rational.
If you can write a number as ratio of integers, it is rational.
-11.7 can certainly be written as a ratio of integers.
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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.