Question

Tolong jawabkan yah cuma no 5 aja kok. pakai cara ya. besok harus dikumpul nih. mohon bantuanny . terima kasih

Answer 1

= Un = 2 + (n-1)3
= 2 + 3n -3
= 3n - 1
=U15= 3n - 1
= 3. 15 - 1
=45 - 1
= 44
=308 = 3n-1
=308+ 1 = 3n
=309 = 3n
=309/3 = n
= 103 = n

Answer 2

A. a=2 b=3
  Un= a+(n-1)b
  Un=2+(n-1)3
  Un=3n-3+2
  Un=3n-1
b. U15=3(15)-1
          =45-1
          =44
c. 308=3n-1
    309=3n
    n=103