Question

cn știe coroană reped ex .7

Answer 1

a) (5^11)^2:5^20+1-1
=5^22:5^20+1-1=
=5^2+1-1=
=25
b) (5^14:5^12)^5:5^9-1=
=(5^2)^5:5^9-1=
=5^10:5^9-1=
=5-1=
=4
c) =(7^11)^2:7^21+1-1=
=7^22:7^21+1-1=
=7+1-1=
=7
d) =(7^17:7^15)^5:7^10-1=
     =(7^2)^5:7^10-1=
     =7^10:7^10-1=
     =1-1=
     =0