Question

ajutor va rog va iubesc va pup ​

Answer 1

Răspuns:

Explicație pas cu pas:

a) (2/5)³·(2/5)² = (2/5³⁺² = (2/5)⁵

aⁿ·aˣ = aⁿ⁺ˣ

b) [(+7/15)³]⁵ :[(+7/15)⁴]³ = (7/15)³ˣ⁵ : (7/15)⁴ˣ³ =

= (7/15)¹⁵⁻¹² = (7/15)³

(aⁿ)ˣ = aⁿˣ

aⁿ : aˣ = aⁿ⁻ˣ

c) (-11/10)³·(-5)⁴:2⁴ = [(-11)³·5⁴]:(10³·2⁴) = (-11³·5⁴) : (5³·2³·2⁴) =

= (-11³·5)/(2⁷) = -1331·5 / 128 = -6655/128

(-a)ⁿ = aⁿ ; daca  n= putere para

(-a)ⁿ = -aⁿ ; daca n = putere impara

d) [(-3)⁻³]⁻² = (-3)⁽⁻³⁾ˣ⁽⁻²⁾ = (-3)⁶ = 3⁶

e) (-5/6)⁻⁴ ·(-6/5)⁻² = (-6/5)⁴ ·(-6/5)⁻² = (-6/5)⁴⁻² = (-6/5)² = (6/5)²

a⁻ⁿ = (1/a)ⁿ