Răspuns:
a) 0
b)10
Explicație pas cu pas:
a)
[tex]7 * [ 7^{4} - 7*(7^{3} - 7^{5} : 7^{3} )] - 7^{4} = 7 * [ 7^{4} - 7* (7^{3} - 7^{2} )] - 7^{4} =\\ =7 *( 7^{4} - 7* 7^{3} + 7* 7^{2}) -7^{4} = 7 *( 7^{4} - 7^{4} + 7^{3} ) -7^{4}=\\= 7 * 7^{3} -7^{4}= 7^{4} -7^{4}=0 \\[/tex]
b)
[tex][(5^{2} )^{5} : 5^{7} - 5^{0} -5^{2} ]:11+1^{2019} = (5^{10} : 5^{7} - 1 - 5^{2}) :11 +1 =\\
= (5^{3} - 1 - 5^{2}) :11+1 = (125-1-25):11+1 = 99:11+1 = 9+1 =10[/tex]
