Pembahasan Matematika IPA kode 248 SBMPTN 2016 - Bagian 2
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Soal no.4
a2 + b2 = |OO'|2
Soal no.5
α adalah sudut antara bidang MNP dan garis PB.
BD=3√2
MN2 = MD2 + DN2 → MN = 2√2
Misalkan Q adalah perpotongan BD dan MN, maka DQ=√2 dan BQ=2√2
Perhatikan ∆BDP
Soal no.6
f(–x) = f(x) dan g(–x) = g(x)
f(x)(x – 1) : (x2 – 2x – 3) f(–1)(–2) = –1 + 3 f(3)(3 – 1) = 3 + 3 → f(3).2 = 6 | → f(1) = f(–1) = –1 → f(3) = f(–3) = 3 | |
(x + 2)g(x) : x2 + 2x – 3 → sisa x + 5 g(1)(1 + 2) = 1 + 5 → g(1) = g(–1) = 2 g(–3)(–3 + 2) = –3 + 5 → g(–3) = g(3) = –2 | ||
xf(x)g(x) : (x2 + 4x + 3) → s(x) = ax + b x = –1 → –1.f(–1).g(–1) = –a + b x = –3 → –3.f(–3).g(–3) = –3a + b | → –a + b = 2 → –3a + b = 18 – 2a = –16 → a = –8 b = –6 | |
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