M⁶ n² - (m -n)² = (m³n)² - (m - n)² = (m³n - m + n) * (m³n + m - n)
4(х²-1)+х(х²-1)=(х²-1)(4+х)=(х-1)(х+1)(4+х)
3у/(у^2-2у)=3у/у(у-2)=3/(у-2)
А1=101; d=3; an=101+3(n–1)=98+3n;
an=998;
98+3n=998
3n=900
n=300
2a1+299d
S300 = -------------- • 300 =(2a1+299d)
2
•150 = (2•101+299•3)•150 = 164850