👤

x+2x+3x+...+100x=50500


Răspuns :

dam x factor comun: X(1+2+3+...+100)=X(100×101:2)=5050x=50500 ⇒x=50500:5050 ; x=10 

:P


(100 *101x ) :2 =50500
10100x : 2 =50500
5050x= 50500
x=10