3. Write an explicit formula for the sequence 10, 95, 9, 85, 8, Then find a_{4} (1 point)
a_{n} - 10 + 0.5(n - 1) a_{4} = 7.5
a_{2} - 10 + 5(n - 1) . a * -6.5
a_{2} - 10 - 5(n - 1) a_{i} - 6
a_{2} - 10 - 5(n - 1) a_{2} - 6.5
a_{n} - 10 + 0.5(n - 1) a_{4} = 7.5
a_{2} - 10 + 5(n - 1) . a * -6.5
a_{2} - 10 - 5(n - 1) a_{i} - 6
a_{2} - 10 - 5(n - 1) a_{2} - 6.5