Answer: 300, 350, 400, 450
Step-by-step explanation:
a1 = first term = 300
d = common difference = 50
2nd term = a+d
= 300 + 50
= 350
3rd term = a + 2d
= 300 + 2(50)
= 300 + 100
= 400
4th term = a + 3d
= 300 + 3(50)
= 300 + 150
= 450
Therefore, the first four terms are 300, 350, 400, and 450.