Respuesta :

mhanifa

Answer:

  • a) 3

Step-by-step explanation:

Use the nth tern equation of the AP

  • [tex]a_n=a_1+(n-1)d[/tex]

We have

  • [tex]a_1=-2[/tex] and [tex]a_{10}=25[/tex]

Find the value of d

  • 25 = - 2 + (10 - 1)d
  • 25 + 2 = 9d
  • 27 = 9d
  • d = 27/9
  • d = 3

Correct choice is a)
  • a=-2
  • n=10

Now

  • a_n=a+(n-1)d
  • 25=-2+9d
  • 9d=27
  • d=3

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