Ответ:

Вариант 2

  1. Преобразуйте выражение:
    1. 1) \( x^{12} \cdot x^3 = x^{12+3} = x^{15} \)
    2. 2) \( a^{-3} \cdot a^8 = a^{-3+8} = a^5 \)
    3. 3) \( t^{-5} \cdot t = t^{-5+1} = t^{-4} \)
    4. 4) \( y^4 \cdot y^{-4} = y^{4+(-4)} = y^0 = 1 \)
    5. 5) \( m^9 : m^5 = m^{9-5} = m^4 \)
    6. 6) \( n^{-12} : n^{-8} = n^{-12 - (-8)} = n^{-12+8} = n^{-4} \)
    7. 7) \( (s^3)^7 = s^{3 \times 7} = s^{21} \)
    8. 8) \( (x^{-4})^5 = x^{-4 \times 5} = x^{-20} \)
    9. 9) \( (k^{-7})^{-2} = k^{-7 \times -2} = k^{14} \)
    10. 10) \( (x^6y)^{-4} = (x^6)^{-4} y^{-4} = x^{-24} y^{-4} \)
    11. 11) \( \left(\frac{a^{-4}}{b^{-2}}\right)^{-3} = \frac{(a^{-4})^{-3}}{(b^{-2})^{-3}} = \frac{a^{12}}{b^6} \)
  2. Вычислите:
    1. 1) \( 2^4 : 2^8 = 2^{4-8} = 2^{-4} = \frac{1}{2^4} = \frac{1}{16} \)
    2. 2) \( (4-1)^{-2} = 3^{-2} = \frac{1}{3^2} = \frac{1}{9} \)
    3. 3) \( 14^{-7} : 14^{-8} = 14^{-7 - (-8)} = 14^{-7+8} = 14^1 = 14 \)
    4. 4) \( (a^{-5})^4 \cdot a^{22} = a^{-5 \times 4} \cdot a^{22} = a^{-20} \cdot a^{22} = a^{-20+22} = a^2 \)
  3. Упростите:
    1. 1) \( \frac{14a^4 b^{-2}}{b^{-3} 56a^4} = \frac{14}{56} a^{4-4} b^{-2 - (-3)} = \frac{1}{4} a^0 b^{-2+3} = \frac{1}{4} b^1 = \frac{b}{4} \)
    2. 2) \( \frac{18x^{-6} 7y^{-5}}{y^5 6x^{12}} = \frac{18 \cdot 7}{6} x^{-6-12} y^{-5-5} = 21 x^{-18} y^{-10} = \frac{21}{x^{18}y^{10}} \)
  4. Вычислить:
    1. 1) \( \frac{(7^{-11})^2}{7^{-23}} = \frac{7^{-11 \times 2}}{7^{-23}} = \frac{7^{-22}}{7^{-23}} = 7^{-22 - (-23)} = 7^{-22+23} = 7^1 = 7 \)
    2. 2) \( 3^{-11} \cdot (3^5)^2 = 3^{-11} \cdot 3^{5 \times 2} = 3^{-11} \cdot 3^{10} = 3^{-11+10} = 3^{-1} = \frac{1}{3} \)
    3. 3) \( \frac{8^{-6} \cdot 8^{-7}}{8^{-12}} = \frac{8^{-6+(-7)}}{8^{-12}} = \frac{8^{-13}}{8^{-12}} = 8^{-13 - (-12)} = 8^{-13+12} = 8^{-1} = \frac{1}{8} \)
    4. 4) \( (7 \cdot 10^3)^2 \cdot (16 \cdot 10^{-4}) = 7^2 \cdot (10^3)^2 \cdot 16 \cdot 10^{-4} = 49 \cdot 10^6 \cdot 16 \cdot 10^{-4} = 49 \cdot 16 \cdot 10^{6-4} = 784 \cdot 10^2 = 78400 \)
    5. 5) \( \frac{2^{-7.217}}{2^8} = 2^{-7.217 - 8} = 2^{-15.217} \)
    6. 6) \( \frac{(6^2)^{-9}}{6^{-20}} = \frac{6^{2 \times -9}}{6^{-20}} = \frac{6^{-18}}{6^{-20}} = 6^{-18 - (-20)} = 6^{-18+20} = 6^2 = 36 \)
    7. 7) \( 7^{-6} \cdot (7^2)^4 = 7^{-6} \cdot 7^{2 \times 4} = 7^{-6} \cdot 7^8 = 7^{-6+8} = 7^2 = 49 \)
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