Răspuns :
(x+1)+(x+2)...(x+41)=40x+860
x·41+(1+2+...+41)=40x+860
41x-40x=860-(1+2+...+41)
x=860-861
x=-1
x·41+(1+2+...+41)=40x+860
41x-40x=860-(1+2+...+41)
x=860-861
x=-1
Pai calculezi cu ajutorul tepriei
(x+1)+(x+2)......(x+41)=40x+860 x·41+(1+2+...+41)=40x+860
41x-40x=860-(1+2+.....+41),x=860-861,x=-1
(x+1)+(x+2)......(x+41)=40x+860 x·41+(1+2+...+41)=40x+860
41x-40x=860-(1+2+.....+41),x=860-861,x=-1