Question

Ex 16
Dau Coroana si pc
Urgent!!Nu fac reclama la philips!!

Answer 1

Răspuns:

Explicație pas cu pas:....................................

Answer 2

Răspuns:

a)$168(169^{2}-169-168)=168[169(169-1)-168]=168(169*168-168)=168[168(169-1)]=168*168*168=168^{3}$

b) 64+2(1+2+...+63)=64+2*63*64/2=64(1+63)=64*64=$2^{6}*2^{6}=2^{12}=(2^{4})^{3}$

c) $2^{2}+2^{2} +2^{3} +2^{4} +2^{5} =2^{2} (1+1+2+4+8)=4*16=64=2^{6}=(2^{2})^{3}$

d)[(2+4+6+...+212)+107]*107=[2(1+2+3+...+106)+107]*107=(2*107*106/2+107)*107=107(106+1)*107=107*107*107=$107^{3}$

Explicație pas cu pas: