Respuesta :

Answer:

  • C. 6

Step-by-step explanation:

Given

  • S = n² + n
  • S = 42, n = ?

Substitute and solve for n:

  • 42 = n² + n
  • n² + 2*1/2n + 1/4 = 42.25
  • (n + 0.5)² = 42.25
  • n + 0.5 = √42.25
  • n + 0.5 = 6.5
  • n = 6

Correct option is C

Answer:

C. 6

Step-by-step explanation: