how do i find the pattern for:
-4,8,-12,16
if the last number is negative, multiply by -1 then add 4
if the last number is positive, add 4, then multiply by -1
or how about
termn+1 = (abs(termn))*(-1)^n, where term1 = -4, n>0
oops that last line should have said:
termn+1 = (abs(termn)+4)*(-1)^n, where term1 = -4, n>0