Practice problem
Simplify the following expression if t≠1t \neq 1t=1 and t≠−1t \neq -1t=−1: t2+1t+1÷t2−1t−1\frac{t^{2}+1}{t+1} \div \frac{t^{2}-1}{t-1}t+1t2+1÷t−1t2−1
t4−1t2−1\frac{t^{4}-1}{t^{2}-1}t2−1t4−1
t2+1t^{2}+1t2+1
t2+1t2+2t+1\frac{t^{2}+1}{t^{2}+2t+1}t2+2t+1t2+1
111
Type a concept, like “slope” or “photosynthesis”.
