Mathematics
Junior High
Solved
なぜ△PSRを求める式がこれになるんですか?
(△PQRの面積は7です。)
(3) SQ//RP より, 等積変形が成立し, △PQR=△PSR となる。
1
APSR==x2×(2a+=a²-5)=
4
a>0より,
a=4
JA
2a+
+² -5
(0, 5) R
S (0, 2a+ a²)
0
7h, a²+8a−48=(a+12)(a−4)=0
2
P (2,1)
y=1/2²
Q(a, a²)
X
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