3. Определите знак коэффициента.

3. Знак коэффициента:

• a) –3a(–2b)(–4) \(\cdot\) \(\frac{1}{7}\)c — (–)
• б) 5x(–2y)c — (–)
• в) –4a(–b)5c(–10) — (+)
• г) –0,1x \(\cdot\) 4,5y \(\cdot\) \(\frac{1}{7}\)a — (–)
• д) 6a(–7b)(–0,9c) — (+)
• e) \(\frac{1}{2}\)m(–0,3a)(–1 \(\frac{1}{3}\)p) — (+)
• ж) \(\frac{3}{7}\)m \(\cdot\) \(\frac{1}{5}\)n(–2p)(–0,1k) — (+)
• 3) a \(\cdot\) b \(\cdot\) c(–1) — (–)