ACT PREP MATH PART-ACT Math Test 1 - Edition 3 Question 2 of 60 Which of these equalities can be used to prove that the radical 23 can also be written using a fractional exponent as 231? 231 x 231. 231+1 = 23 (231)-231x4-231-23 23 2-231-1-230 231-231- 23 -231-4 Next Reset 23-1 = 23-1