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Peru
La medida de un ángulo de puede expresar como \( (7 n+1)^{\circ} \) o como \( (7 n+5)^{g} \). Cuál es el valor de \( \theta=\left(n^{2}-1\right)^{\circ} \) en radianes
Trigonometry Jan 20, 2025
19. Sic \( \frac{1}{x}+\frac{1}{y}=\frac{4}{x+y} \) Calcallar: \( E=\frac{x^{2}-y^{2}}{x y}+\frac{x y}{x+y}+\frac{(x+y)^{2}}{x^{2}} \)
Algebra Jan 19, 2025
19. Si: \( \frac{1}{x}+\frac{1}{y}=\frac{4}{x+y} \) Calcular: \( E=\frac{x^{2}-y^{2}}{x y}+\frac{x y}{x+y}+\frac{(x+y)^{2}}{x^{2}} \)
Algebra Jan 19, 2025
6. Efectuar: \( k=(x-1)(x+4)(x-3)(x+2)-(x-2)(x+3)(x+5)(x-4) \) \( -12\left(x^{2}+x-1\right) \)
Algebra Jan 19, 2025
\( x^{2}+1=6 x \) Holla \( x^{2}+x^{-2} \)
Algebra Jan 19, 2025
\( x^{2}+1=6 x \) Hollo \( x^{2}+x^{-2} \)
Algebra Jan 19, 2025
Calcule \( Q=\frac{\tan ^{4} 60^{\circ}-\sec ^{4} 45^{\circ}}{\left(\sec 30^{\circ}-\cot 60^{\circ}\right)^{2}} \)
Trigonometry Jan 18, 2025
13. Cierto catión de carga dos de un átomo Q tiene igual número de electrones con \( \mathrm{el}_{35} \mathrm{~J}^{3+} \). Además es isótono con \( 7_{31}^{70} \mathrm{~L} \). Calcula el número de masa y el número de electrones del catión de carga 4 del átomo Q. \( \begin{array}{ll}\text { A) } 73 ; 27 & \text { B) } 32 ; 27 \\ \text { C) } 59 ; 23 & \text { D) } 57 ; 31 \\ \text { E) } 73 ; 30 & \end{array} \)
Chemistry Jan 18, 2025
1. Hallar la suma de cifras del numero: \[ 100200300 \ldots 900_{(49)} \] Cuando se representa en base 7 \( \begin{array}{lllll}\text { a) } 20 & \text { b) } 24 & \text { c) } 27 & \text { d) } 28 & \text { e) } 45\end{array} \)
Pre Algebra Jan 18, 2025
8. Si se cumple: \( \frac{a(a+b)(a-2)(b-4)_{(8)}}{}=\overline{m n(2 b-1)_{(12)}} \) Calcule " \( a+b+m+n \) " \( \begin{array}{lll}\text { a) } 16 & \text { b) } 17 & \text { c) } 18 \\ \text { d) } 19 & \text { e) } 20 & \end{array} \)
Algebra Jan 18, 2025
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