一次 / 線形変換 2.

以下に示すようなベクトル$$bm{x}$$、$$bm{y}$$ を像 $$bm{x}^{prime}$$、$$bm{y}^{prime}$$ に移す線形変換を表す行列 $$A$$ を求めてください.
(答えは a → b → c → d の順に記述してください.)
$${LARGE [
A = left(
begin{array}{ccc}
a & b \
c & d
end{array}
right),
bm{x} = left(
begin{array}{ccc}
-1 \
2
end{array}
right),
bm{y} = left(
begin{array}{ccc}
0 \
2
end{array}
right),
bm{x^{prime}} = left(
begin{array}{ccc}
1 \
6
end{array}
right),
bm{x^{prime}} = left(
begin{array}{ccc}
4 \
8
end{array}
right)
] }$$

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