👤
Pcati35
a fost răspuns

VA ROG FRUMOS
DETERMINATI A,B,C,D STIIND CA:
8+16+24+32+....+ABCD (CU BARA DEASUPRA)=ABCD00(CU BARA DEASUPRA)

Răspuns :

Renatemambouko
notam ABCD cu x
8+16+24+32+....+x=x×100
8(1+2+3+4+....+x/8)=x×100
8×x/8 ×(x/8 +1)/2=x×100
4×x/8 ×(x/8 +1)=x×100
x/8 ×(x/8 +1)=25x
x²/64+x/8=25x
x²+8x=1600x
x²=1592x
x=1592
A=1
B=5
C=9
D=2


Alte intrebari