Ответы на вопрос:
1) [email protected]@-2& [email protected]& 2) =5×-2¥+3×=8×-2¥ 3) =3m-(5m-2m+1)=3m-3m-1=-1 4) [email protected] [email protected]@ [email protected]
D=a2-a1=-8-(-2)=-6
a3=a1+2d=-2+2*(-6)=-14
a4=a1+3d=-2+3*(-6)=-20
S4=2a1+3d/2*4=2*(-2)+3*(-6)/2*4=-44
a3=a1+2d=-2+2*(-6)=-14
a4=a1+3d=-2+3*(-6)=-20
S4=2a1+3d/2*4=2*(-2)+3*(-6)/2*4=-44
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