Question

21⁴⁵:(-3)⁴³: (-7)⁴⁴ =​

Answer 1

Răspuns: $\bf \red{\underline{-63}}$

Explicație pas cu pas:

21⁴⁵ : (-3)⁴³ : (-7)⁴⁴ =​

21⁴⁵ : (-3)⁴³ : 7⁴⁴ =​

[7⁴⁵ · 3⁴⁵] : (-3)⁴³ : (-7)⁴⁴ =​  

- [7⁴⁵ · 3⁴⁵⁻⁴³] : 7⁴⁴  =​

-(7⁴⁵· 3²) : 7⁴⁴=​    

-7¹ · 3² = - 7 · 9 = - 63

         sau

$\bf 21^{45}:(-3)^{43}:(-7)^{44} = \dfrac{21^{45}}{(-3)^{43}} :(-7)^{44} =$

$\bf -\dfrac{21^{45}}{3^{43}} :7^{44} =-\dfrac{3^{45}\cdot 7^{45}}{3^{43}} :7^{44} =$

$\bf -\dfrac{\not3^{45}\cdot 7^{45}}{\not3^{43}} :7^{44} =-3^{2}\cdot 7^{45}:7^{44} =$

$\bf -3^{2}\cdot 7^{45-44} =-9\cdot 7^{1} =$

$\bf \red{\underline{-63}}$

==pav38==

Mult succes !