3.536915775 is the square root of that number
The negative sign isnt changing back and forth, so its not a geometric sequence
the difference between each term looks to be constant at 10
a1= 3
a2=-7= a1-10
a3= -17 =a2-10
oh look a pattern
an= a(n-1) - 10
I THINK the answer is compatible numbers.............. but I'm pretty sure it is compatible numbers
The correct value is 18 for the range
