Question

Please answer this question​

Answer 1

ANSWER....

$y = \frac{4 + x}{4 - x} \\ \\ we \: know \: that \: 4 - x \: is \: not \: equal \: \\ to \: zero \: so \: we \: can \: put \: any \: value \: \\ of \: x \: except \: 4 \: so \: domain \: is \: all \\ real \: number \: except \: 4 \\ \\ y = \frac{4 + x}{4 - x} \\ \\ y(4 - x) = 4 + x \\ \\ 4y - xy = 4 + x \\ \\ 4(y - 1) = x(y + 1) \\ \\ 4 \frac{(y - 1)}{(y + 1)} = x \\ \\ to \: find \: range \: of \: a \: question \: you \: \\ can \: convert \: the \: equation \: in \: y \: \\ \\ so \: we \: know \: that \: y + 1 \: is \: not \: equal \: to \: 0 \: \\ so \: the \: range \: of \: the \: question \: is \: all \: real \: no. \\ except \: - 1$

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