Question

va rog ajutatima am doua exerciti x+2x+...+100x=50500
si al doilea este aflati a si b (a-5)*(b-7)=0

Answer 1

1)x+2x+3x+...+100x=50500; x(1+2+3+...+100)=50500; x•100•101/2=50500; 5050x=50500; x=50500/5050=10; 2)(a-5)(b-7)=0; a-5=0=>a=5; b-7=0=>b=7