Question
Answer
$$-\dfrac{1}{2(t+1)}=-\dfrac{1}{2t+2}$$
Explanation
| $$ \begin{aligned}-\frac{1}{2(t+1)}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-\frac{1}{2t+2}\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{2} $ by $ \left( t+1\right) $ $$ \color{blue}{2} \cdot \left( t+1\right) = 2t+2 $$ |
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