Question

Am nevoie neaparat de c ,d si e va rog 40 de puncte si coroana pls...

Answer 1

c) 2a5 divizibil cu 9=>(2+a+5) divizibil cu 9=>(7+a) divizibil cu 9=>a=2

2a5=225

225/35=36/×=>×= 36•35/225=5,6

d) 32^404=(2^5)^404=2^2020

×=[(2^2019+2^2020+2^2021)•0,5]/2^2020

×=[2^2020(2^(-1)+1+2^1)•0,5)]/2^2020

×=(1/2+3)•0,5=3,5•0,5=1,75

e) 1+2+3+...+102=102•103/2=51•103=5253

×=[5253•(0,(3)]/103=(5253•3/9)/103=1751/103=17

Answer 2

Răspuns:

Explicație pas cu pas: