An "n"-th root of a number "r" is a number which, if "n" copies are multiplied together, makes "r". It is also called a radical or a radical expression. It is a number "k" for which the following equation is true:
ʌ n WORD_BOUNDARY ɛ n WORD_BOUNDARY t iː eɪ t̠ʃ WORD_BOUNDARY ɹ uː t WORD_BOUNDARY ə v ə WORD_BOUNDARY n ʌ m b ə ɹ ɹ WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY ɪ z WORD_BOUNDARY ʌ WORD_BOUNDARY n ʌ m b ə ɹ WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY ɪ f WORD_BOUNDARY ɛ n WORD_BOUNDARY k ɑ p ɪ z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY m ʌ l t ɪ p l aɪ d WORD_BOUNDARY t ə ɡ ɛ ð ə ɹ WORD_BOUNDARY m eɪ k s WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY ɪ t WORD_BOUNDARY ɪ z WORD_BOUNDARY ɔ l s oʊ WORD_BOUNDARY k ɔ l d WORD_BOUNDARY ʌ WORD_BOUNDARY ɹ æ d ɪ k ə l WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY ʌ WORD_BOUNDARY ɹ æ d ɪ k ə l WORD_BOUNDARY ɛ k s p ɹ ɛ ʃ ə n WORD_BOUNDARY ɪ t WORD_BOUNDARY ɪ z WORD_BOUNDARY ʌ WORD_BOUNDARY n ʌ m b ə ɹ WORD_BOUNDARY k eɪ WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY ð ə WORD_BOUNDARY f ɑ l oʊ ɪ ŋ WORD_BOUNDARY ɪ k w eɪ ʒ ə n WORD_BOUNDARY ɪ z WORD_BOUNDARY t ɹ uː WORD_BOUNDARY