Answer: 2.5, 3, 3.5
Step-by-step explanation: In patterns like these, they typically increase at a constant rate. For example, in 7, 9, __, __ the missing number are 11 and 13. The rule is to add by 2 to find each new number. In the terms you are given, the only logical solution is to add 0.5 each time, giving you 2.5, 3, and 3.5 as the missing terms. In future questions like this, the best advice I can give is to guess and check.