yes
Chat with our AI personalities
No, and nor is negative 5 pi.
It is a rational number because it can be expressed as an improper fraction in the form of -80/1
Five examples of irrational numbers are Pi, the Golden Ratio, Euler's number, the square root of 7.298363, and the cubed root of 26.483738.
There are an infinite number of irrational numbers. Here are some: e (the base for natural logarithms), pi, sqrt(2), sqrt(3), sqrt(5), square root of any number that is not a perfect square: perfect squares are 12 22 32 42 52 etc. which equals 1 4 9 16 25 ..... natural logarithm of any rational number (greater than zero) will be irrational. but not 1, since ln(1) = 0, which is not irrational. Note the logarithm of a negative number is a complex number, and the logarithm of zero is negative infinity.
"Irrational" numbers are the name for numbers that cannot be expressed in fractions; that is, in a "ratio" of one number to another. The number .5 is 1/2; one divided by two. The most useful "irrational" number is the number "pi", the ratio of the diameter of a circle divided by its circumference. There is no fraction that exactly equals "pi", although 22/7 is close. Another irrational number is the number "e", the root of the "natural logarithms". This is extensively used in engineering and electronic calculations.