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7⁻²×49²
--------- × (¹/₇)³ × (7⁴)⁵ =
7⁴
=7⁻²×7⁴×7⁻⁴× 7⁻³ × (7⁴)⁵ =
=7⁻²⁺⁴⁻⁴⁻³⁺²⁰=7¹⁵
2. Oblicz:
√45 + √¹⁶/₉ - √(9-4) - √20 =
3√5+4/3-√5-2√5=+4/3
3. Zapisz potęgą w postaci sumy algebraicznej:
(5axy - 2az)² =
=25a²x²y²-20a²xyz+4a²z²
7⁻²×49²
--------- × (¹/₇)³ × (7⁴)⁵ =7⁻²*(7²)²*7⁻⁴*7⁻³*(7⁴)⁵=7⁻²*7⁴*7⁻⁴*7⁻³*7²⁰=
7⁴
=7⁻²⁺⁴⁻⁴⁻³⁺²⁰=7¹⁵
2. Oblicz:
√45 + √¹⁶/₉ - √9-4 - √20 =√(9*5)+4/3-3-4-√(4*5)=3√5+4/3 -7-2√5=√5-17/3
3. Zapisz potęgą w postaci sumy algebraicznej:
(5axy - 2az)² =(5axy)²-2*5axy*2az+(2az)²=25a²x²y²-20a²xyz+4a²z²
--------- × (¹/₇)³ × (7⁴)⁵ =
7⁴
7⁻²×(7²)²
---------- ×7⁻³ ×7²⁰ = 7⁻²×7¹⁷ = 7¹⁵
7⁴
√45 + √¹⁶/₉ - √9-4 - √20 =
3√5 + √15/3 - √5 - 2√5 = √15/3
(5axy - 2az)² = 25a²x²y² - 20a²xyz + 4a²z²