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x=(1+2+3+...+100)+51 ​

Răspuns :

Salut! ♡

x=(1+2+3+...+100) +51

x= 100×101:2 +51

x= 101×50 +5

x= 5050 + 5

x= 5055

Sper să fie corect!

Succes!

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Targoviste44ask

[tex]\it x=(1+2+3+\ ...\ +100)+51=\dfrac{100\cdot101}{2}+51=50\cdot101+51=\\ \\ 50(50+51)+51=50\cdot50+50\cdot51+51=50\cdot50+51(50+1)=\\ \\ 50\cdot50+51\cdot51=50^2+51^2[/tex]