Question

Afla numerele necunoscute : a) m×m×m×5=4×8+2×4 si b) n:n+1+nxn×n=33-3-3:3

Answer 1

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➤ Cerință: Află numerele necunoscute:

➤ Răspuns:

a)

m × m × m × 5 = 4 × 8 + 2 × 4

5 × m³ = 32 + 8

5 × m³ = 40

m³ = 40 : 5

m³ = 8 ⇒ m = 2    ;  ( 2³ = 2 × 2 × 2 = 8 )

b)

n : n + 1 + n × n × n = 33 - 3 - 3 : 3

1 + 1 + n³ = 33 - 3 - 1

2 + n³ = 30 - 1

2 + n³ = 29

n³ = 29 - 2

n³ = 27 ⇒ n = 3    ;  ( 3³ = 3 × 3 × 3 = 27 )

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