7. Which of the following is the geometric explicit formula? 1). a .= a,+d(n-1)
2). a .=(r)"
3). y = ax'+bx+c
4). a = d+r(n-1)

c. (3,2,6) is the answer.

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d