I hold a bachelor's degree in mathematics with teaching experience at schools and as an online tutor and contributor to different websites such as slader.com and Photomath.
Which of the sequences $\left\{a_{n}\right\}$ in Exercises $27-90$ converge, andwhich diverge? Find the limit of each convergent sequence.$$a_{n}=\frac{1-2 n}{1+2 n}$$