Question

A= (-1)²ⁿ.(-1)ⁿ.(-1)ⁿ⁺¹(n thuộc N)

Answer 1

A = (-1)²ⁿ .(-1)ⁿ.(-1)ⁿ⁺¹

A = (-1)^2n+n+n+1

A = (-1)⁴ⁿ⁺¹

Answer 2

\(A=\left(-1\right)^{2n}\cdot\left(-1\right)^n\cdot\left(-1\right)^{n+1}\)

\(A=\left(-1\right)^{2n+n+n+1}\)

\(A=\left(-1\right)^{4n+1}\)

Answer 3

\(A=\left(-1\right)^{2n}.\left(-1\right)^n.\left(-1\right)^{n+1}\)

\(A=\left(-1\right)^{2n+n+n+1}\)

\(A=\left(-1\right)^{4n+1}\)

Chúc bạn học tốt !