Question

ex 6 Ajutorrrrrrrrrrrrrrr​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

x = 19*9 + 19*10 = 19*(9 + 10) = 19*19

√19*19 = 19

b)

x = 2^11 - 2^10 = 2^10*(2 - 1) = 2^10

√2^10 = 2^5 = 32

c)

x = 200 + 199*200 = 200*(1 + 199) = 200*200

√200*200 = 200

d)

x = n + n*(n - 1) = n + n^2 - n = n^2

√n^2 = n

e)

√441 = 21

42*43 + 43*44 = 43*(42 + 44) = 43*86

43*86/2 = 43*43

x = 21 + √43*43 = 21 + 43 = 64

√64 = 8

f)

3^n+2 - 3^n+1 - 2*3^n = 3^n*(9 - 3 - 2) = 4*3^n

x = 4*3^n/3^n = 4

√4 = 2