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2Pallie2
26.07.2021 •
Mathematics
. Cho tam giác ABC vuông tại A. Các tia phân giác BM và CN cắt nhau tại I. Gọi D, E, F lần lượt là hình chiếu của điểm I xuống các cạnh AB, AC, BC.
a) So sánh AN và BN; AM và CN.
b) Chứng minh AD = AE.
c) Tính độ dài các đoạn thẳng AD, AE nếu AB = 8cm, AC = 15cm.
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Ответ:
The answer to your question is 2, 1/2, 1, 2
Step-by-step explanation:
a) 3² 4³ 2⁻¹ / (3 4)² = (3²)(4²) 4 (2⁻¹) / (3 4)² = (3 4)² 2² 2⁻¹ / (3 4)² = 2
b) 2⁴ 3⁵ / (2 3)⁵ = 2⁴ 3⁴ 3 / (2 3)⁵ = (2 3)⁴ 3 / (2 3)⁵ = 3 / 2 3 = 1/2
c) 3⁻³ 2⁻³ 6³ / (4°)² = (3 2)⁻³ 6³ / 1² = 6⁻³ 6³ = 1
d) (3 2)⁴ 3⁻³ / 2³3 = 3⁴2⁴ 3⁻³ / 2³3 = 3 2 / 3 = 2