В решении.
Объяснение:
7) (а⁻⁴)⁸ = а⁻³²;
8) (а³)⁻⁷ * (а⁻⁴)⁻⁵ : (а⁻⁵)⁸ =
= а⁻²¹ * а²⁰ : а⁻⁴⁰ =
= а⁻¹ : а⁻⁴⁰ = 1/а : 1/а⁴⁰ = (1*а⁴⁰)/(а*1) = а³⁹;
9) (а⁵b⁻³c⁴)⁻¹⁰ =
= a⁻⁵⁰b³⁰c⁻⁴⁰ = b³⁰/a⁵⁰c⁴⁰;
10) (a²b⁻³)⁻³ * (a⁻⁴b⁻⁹)⁶ =
= a⁻⁶b⁹ * a⁻²⁴b⁻⁵⁴ =
= b⁹/a⁶ * 1/a²⁴b⁵⁴ =
=(b⁹ * 1)/(a⁶*a²⁴b⁵⁴) =
= 1/a⁶⁺²⁴b⁵⁴⁻⁹ =
= 1/a³⁰b⁴⁵;
11) ((a¹²b⁻⁴)/(c⁵d⁻¹³))⁻² =
=(a⁻²⁴b⁸)/(c⁻¹⁰d²⁶) =
=b⁸/a²⁴ : d²⁶/c¹⁰ =
= (b⁸c¹⁰)/(a²⁴d²⁶);
12) (a⁷/b⁻³)⁻⁴ * (a⁻³/b⁹)⁻¹² =
= (a⁻²⁸/b¹²) * (a³⁶/b⁻¹⁰⁸) =
= (1/a²⁸ : b¹²) * (a³⁶ : 1/b¹⁰⁸) =
= 1/(a²⁸b¹²) * (a³⁶b¹⁰⁸) =
= (a³⁶b¹⁰⁸)/(a²⁸b¹²) =
= a⁸b⁹⁶.
Вычислить значение выражения:
4) 3⁻¹⁴ * 3⁻¹⁹ : 3⁻³⁴ =
= 3⁻³³ : 3⁻³⁴ =
= 1/3³³ : 1/3³⁴ =
=3³⁴/3³³ = 3;
5) (13⁻⁹)⁴ * (13⁻²)⁻¹⁸ =
= 13⁻³⁶ * 13³⁶ =
= 13³⁶/13³⁶ = 1;
6) (2⁻⁴ * (2⁻³)⁵)/((2⁻⁸)² * 2⁻³) =
= (2⁻⁴ * 2⁻¹⁵)/(2⁻¹⁶ * 2⁻³) =
=2⁻¹⁹/2⁻¹⁹ = 1.
(x - 2)(4x + 1) < (x + 1)² + 3
4x² + x - 8x - 2 < x² + 2x + 1 + 3
4x² - 7x - 2 - x² - 2x - 4 < 0
3x² - 9x - 6 < 0
x² - 3x - 2 < 0
x² - 3x - 2 = 0
D = (-3)² - 4 * (- 2) = 9 + 8 = 17