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  2. Exponentiation - Wikipedia

    en.wikipedia.org/wiki/Exponentiation

    Exponentiation with negative exponents is defined by the following identity, which holds for any integer n and nonzero b: =. [1] Raising 0 to a negative exponent is undefined but, in some circumstances, it may be interpreted as infinity (). [22]

  3. nth root - Wikipedia

    en.wikipedia.org/wiki/Nth_root

    An unresolved root, especially one using the radical symbol, is sometimes referred to as a surd [2] or a radical. [3] Any expression containing a radical, whether it is a square root, a cube root, or a higher root, is called a radical expression , and if it contains no transcendental functions or transcendental numbers it is called an algebraic ...

  4. Square root - Wikipedia

    en.wikipedia.org/wiki/Square_root

    The radicand is the number or expression underneath the radical sign, in this case, 9. For non-negative x , the principal square root can also be written in exponent notation, as x 1 / 2 {\displaystyle x^{1/2}} .

  5. Square root of 7 - Wikipedia

    en.wikipedia.org/wiki/Square_root_of_7

    Each convergent is a best rational approximation of ; in other words, it is closer to than any rational with a smaller denominator. Approximate decimal equivalents improve linearly (number of digits proportional to convergent number) at a rate of less than one digit per step:

  6. Real number - Wikipedia

    en.wikipedia.org/wiki/Real_number

    Zermelo–Fraenkel set theory with the axiom of choice guarantees the existence of a basis of this vector space: there exists a set B of real numbers such that every real number can be written uniquely as a finite linear combination of elements of this set, using rational coefficients only, and such that no element of B is a rational linear ...

  7. Nested radical - Wikipedia

    en.wikipedia.org/wiki/Nested_radical

    The nested radicals in this solution cannot in general be simplified unless the cubic equation has at least one rational solution. Indeed, if the cubic has three irrational but real solutions, we have the casus irreducibilis , in which all three real solutions are written in terms of cube roots of complex numbers.

  8. Algebraic number - Wikipedia

    en.wikipedia.org/wiki/Algebraic_number

    All rational numbers are algebraic. Any rational number, expressed as the quotient of an integer a and a (non-zero) natural number b, satisfies the above definition, because x = ⁠ a / b ⁠ is the root of a non-zero polynomial, namely bx − a. [1]

  9. Algebraic operation - Wikipedia

    en.wikipedia.org/wiki/Algebraic_operation

    The radical sign √, denoting a square root, ... For example, exponentiation with an integer or rational exponent is an algebraic operation, ...

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