![\huge\boxed{417}](https://img.qammunity.org/2021/formulas/mathematics/middle-school/y7yintuazmsyo5rn5b6foftg2x2cvi74d6.png)
Start with the formula for an arithmetic sequence, where
is the
th term of the sequence and
is the common difference between terms.
![a_n=a_1+(n-1)d](https://img.qammunity.org/2021/formulas/mathematics/middle-school/z3x908ob45q3vvx5ngmqfg3i3kob6ay7ud.png)
Find the difference between any two consecutive terms.
![25-18=7](https://img.qammunity.org/2021/formulas/mathematics/middle-school/n5fral08izaox8hhmaxqcarpnen4xvkqkq.png)
Substitute the known values into the formula.
![a_(58)=18+(58-1)7](https://img.qammunity.org/2021/formulas/mathematics/middle-school/699lqxi70j5a0y4ezsdtngampfw9qdxqgp.png)
Subtract.
![a_(58)=18+57*7](https://img.qammunity.org/2021/formulas/mathematics/middle-school/d08dppsjs7irrbja1wjhx3rahaspbng535.png)
Multiply.
![a_(58)=18+399](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ufogtwqx1q6o27ggqyxhln9calrnazy4l4.png)
Add.
![a_(58)=\boxed{417}](https://img.qammunity.org/2021/formulas/mathematics/middle-school/1ekxlfqednrv9t5ammhjbf1qvgy6uftngk.png)