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ar³ = 27/7
ar 6
r² = 27 = 9/14 ⇔ r = +-√9/14 maka r = 3/14 √14 atau r = - 3/14 √14
42
ar = 6 ⇔ a(3√14)/14 = 6 atau a(-3√14)/14 = 6
a = 84 . √14 a = 84 .√14
3√14 √14 - 3√14 √14
a = 84√14 a = 84√14
42 - 42
a = 2√14 a = -2√14
U7 = ar^6 atau U7 = ar^6
= (2√14)(3√14)^6 = (-2√14)(-3√14)^6
= 4000752√14 = - 4000752√14
ar^3 / ar = 27/42
r^2 = 9 / 14
r = 3 / akar 14
U2 = ar
6 = a 3 / akar 14
6 x akar 14 = 3a
6 x akar 14 / 3 = a
maap sepertinya nilainy tdk bulat