The number which is repeated as a factor in an exponential expression exponent 2. the fixed amount multiplied by a term to get to the next term in a geometric sequence radical expression 3. the (superscript) number in an exponential expression which tells how many times a factor is repeated index 4. a sequence in which there is a common ratio between the terms geometric sequence 5. the small number preceding a radical symbol that indicates the desired root of the radicand rationalize 6. expressions having the same root index and the same radicand like radicals 7. an expression that contains a radical; √7 and √21y are examples of radical expressions term 8. the expression under a radical symbol common ratio 9. eliminate the radical from the denominator of a fraction radicand 10. a set of numbers that follows a pattern, with a specific first number sequence 11. an individual quantity or number in a sequence base