tn = t1 x (r^n-1)
4x - 3 = (x + 2) x (r^2) / x + 2
4 - 1.5 = r^2
2.5 = r^2
r = 1.58
but I tried testing that by substituting it with equation to try to figure out t1, 2, and 3
4x - 3 = t1 x (1.58^2)
4x - 3 = t1 x (2.5) / 2.5
1.6x - 1.2 = t1
the first 3 terms of an AP are x, 2x+1 and 5x-1. find x and the sum of the first 10 terms
1 answer
1 answer