No.
Radical(1.21) = 1.1, for example, is rational.
If the symbol preceding the 61 is intended to be a radical sign, the answer is yes. If it is not a radical, it depends on the value of v.
There is no special symbol to indicate an irrational number.
-The radical is the symbol that represents a square root. -The radicand is the number underneath the radical symbol. -The coefficient is the number out in front of the radical. (We assume that the coefficient multiplies the radical, the same way it would multiply with a variable.)
There is no special symbol for irrational numbers in general. There are symbols for some special numbers, such as pi and e.
There is no special symbol for an irrational number. However, it is known that many square roots, cubic roots, etc., as well as some special numbers such as pi and e, are irrational.
Radicand
The term radicand means the number or expression inside the radical symbol. For example, when we have the square root of 2, the 2 is inside the radical symbol. It is the radicand. The radicand may be a number or an algebraic expression. Also, there is not limit to the number of terms the radicand may contain. It may even be infinite!
The discriminant
discriminant
The radical symbol ( √ ) followed by a line above what's in the radical, designates positive square root.
An irrational number is a number that cannot be represented by a ratio of two integers, in the form x/y where y > 0. There is no particular symbol for irrational numbers. The set notation R∩ Q', representing Reals (R) other than Rationals (Q) may be used.
Because pi is an irrational number that has an infinite amount of digits