Sis a geometric sequence. (square root x-1),1 and (square root x+1) are the first three terms of s. find the value of x.

x = ±

Step-by-step explanation:

given the 3 terms of a geometric sequence

, 1, , then the common ratio r

r = = ( cross- multiply )

= 1 ( square both sides )

(x + 1 )(x - 1 ) = 1 ← expand factors on left side )

x² - 1 = 1 ( add 1 to both sides )

x² = 2 ( take the square root of both sides )

x = ±

the correct answer is the second option

b

step-by-step explanation:

the word superfluous means unnecessary