The first three terms of the sequence are 25, 28, and 31. Therefore, the correct answer is: 25, 28, 31.
Let's find the first three terms of the sequence given by
a_n =25+3(n−1) for
n=1,2,3,…:
When n=1:
a_1 =25+3(1−1)=25
When n=2:
a_2 =25+3(2−1)=28
When n=3:
a_3 =25+3(3−1)=31
So, the first three terms of the sequence are 25, 28, and 31. Therefore, the correct answer is: 25, 28, 31.