What do you call the positive N root of a number?

Every positive real number x has a single positive nth root, called the principal nth root, which is written.

Step-by-step explanation:

by definition, an arc subtended by a central angle of some given measure has the same measure. so .

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5