rootsandradicalexpressions7根和根的表達(dá)式-在線(xiàn)瀏覽
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【正文】 the value you are taking the root of. Ex: x?4 81 4 MATH 5 81 ENTER 3 Practice: Find each root 3 1 0 6 4 85 16807Solutions: 22, 7, and ERR: NONREAL ANS 4 16?Let’s take a closer look at this answer Properties and Notation: aan ?When n is an even number Why? We want to make sure that the root is always positive when the index is an even number p o s i t i v e . s t a y si t s u r e m a k e t o v a l u ea b s o l u t e t h eu s e W ef o r wa r d s . a n db a c k wa r d s t r u eisi t t h a t so i n d e x e se v e n wi t h p o s i t i v e a a l wa y s is t h a t x s u r e m a k e wa n t t o we525)5(,5 if B U T5255,5 IF:ita t l o
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