Răspuns:
=(2*1+2*2+2*3+...+2*16)+(1+1+1+...+1)=
=2*(1+2+3+...+16)+16=
=16*17+16=
=16*(17+1)=
=16*18
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Răspuns:
=(2*1+2*2+2*3+...+2*16)+(1+1+1+...+1)=
=2*(1+2+3+...+16)+16=
=16*17+16=
=16*(17+1)=
=16*18