Question

VA ROG AM NEVOIE REPEDE DE RASPUNS, MULTUMESC!​

Answer 1

Răspuns:

Explicație pas cu pas:

2^4n+2 = 2^2(2n+1) = (2^2n+1)^2 patrat perfect

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9^n+1 = (3^2)^n+1 = (3^n+1)^2 = patrat perfect

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7^6n = (7^3n)^2 = patrat perfect

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15^n^2+n = 15^numar par = patrat perfect

n*2 + n = n(n+1) = produs de doua numere consecutive, deci numar par