Question

Calculati : x; x²; x³; x; x daca : a) x = -2; b) x = +2 ; c) x = -1 ; Va rog ajutatima va rog dau 13 puncte

Answer 1

a) x=-2 => x=-2 =>x

x=-4 =>x²

x=-8 =>x³

b)x=+2 =>x=+2 (sau 2) =>x

x=+4 =>x²

x=+8 =>x³

c)x=-1=>x=-1 =>x

x=-1 =>x²

x=-1 =>x³

Answer 2

a) x = - 2

x² = ( - 2)² = ( - 2) × ( - 2) = 4

x³ = ( -2)³ = ( - 2) × ( - 2) × ( - 2) = 4 × ( - 2) = - 8

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b) x = + 2

x² = ( + 2)² = ( + 2) × ( + 2) = 4

x³ = ( + 2)³ = ( + 2) × ( + 2) × ( + 2) = + 8

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c) x = - 1

x² = ( - 1)² = ( -1 ) × ( - 1) = + 1

x³ = ( - 1)³ = ( - 1 ) × ( - 1 ) × ( - 1) = ( + 1) × ( - 1) = - 1

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