Question

Please help me with this question

Answer 1

$e=\frac{T- n}{T+n}$

Step-by-step explanation:

Here we have , to make e as subject of formula and given expression is:

$T = \frac{n(1+e)}{(1-e)}$

⇒ $T = \frac{n(1+e)}{(1-e)}$

⇒ $T(1-e) = \frac{n(1+e)}{(1-e)}(1-e)$

⇒ $T(1-e) = n(1+e)$

⇒ $T-T(e)= n+n(e)$

⇒ $T-T(e)+T(e)= n+n(e)+T(e)$

⇒ $T= n+e(T+n)$

⇒ $T- n=e(T+n)$

⇒ $e=\frac{T- n}{T+n}$

Therefore, $e=\frac{T- n}{T+n}$ .