Suriin ang IDNStudy.com para sa malinaw at detalyadong mga sagot. Hanapin ang impormasyon na kailangan mo nang mabilis at madali sa pamamagitan ng aming komprehensibo at eksaktong platform ng tanong at sagot.

The fourth term is 19 and the seventh term is 28

Sagot :

I assume this is an arithmetic sequence
28 = a₁+6d
19 = a₁+3d
9 = 3d
d = 3 therefore, the common difference is 3
Solve for first term
28 = a₁+6(3)
28 = a₁+18
a₁ = 10

Therefore, the nth term rule for this arithmetic sequence is
an = 10+3(n-1)
an = 10+3n-3
an = 3n+7