Question

The first term in the arithmetic sequence is 1 and the fifth is 3. What is the tenth term in the sequence?

Answer 1

$$a=1$$

$$a_5=a+4d=3$$

$$1+4d=3$$

$$d=0.5$$

$$a_{10}=a+9d=1+9(0.5)=5.5$$

$$a_{10}=5.5$$