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This makes the principal n th root a continuous function in the whole complex plane, except for negative real values of the radicand. This function equals the usual n th root for positive real radicands. For negative real radicands, and odd exponents, the principal n th root is not real, although the usual n th root is real.
Calculators may associate exponents to the left or to the right. For example, the expression a^b^c is interpreted as a (b c) on the TI-92 and the TI-30XS MultiView in "Mathprint mode", whereas it is interpreted as (a b) c on the TI-30XII and the TI-30XS MultiView in "Classic mode".
Algebraic notation describes the rules and conventions for writing mathematical expressions, as well as the terminology used for talking about parts of expressions. For example, the expression + has the following components: Algebraic expression notation: 1 – power (exponent) 2 – coefficient 3 – term
A root of degree 2 is called a square root and a root of degree 3, a cube root. Roots of higher degree are referred by using ordinal numbers, as in fourth root, twentieth root, etc. The computation of an n th root is a root extraction. For example, 3 is a square root of 9, since 3 2 = 9, and −3 is also a square root of 9, since (−3) 2 = 9.
To find the number of negative roots, change the signs of the coefficients of the terms with odd exponents, i.e., apply Descartes' rule of signs to the polynomial = + + This polynomial has two sign changes, as the sequence of signs is (−, +, +, −) , meaning that this second polynomial has two or zero positive roots; thus the original ...
In calculus, the reciprocal rule gives the derivative of the reciprocal of a function f in terms of the derivative of f.The reciprocal rule can be used to show that the power rule holds for negative exponents if it has already been established for positive exponents.