Question

find the 16term of AP:2,7,12...

Answer 1

2+(16-1)5
=2+15×5
=2+75
=77

Answer 2

$a = t1 = 2 \\ t2 = 7 \\ d = t2 - t1 \\ \: \: \: \: = 7 - 2 \\ \: \: \: \: = 5 \\ tn = a + (n - 1) \times d \\t16 = 2 + (16 - 1) \times 5 \\ \: \: \: \: \: \: \: = 2 + 15 \times 5 \\ \: \: \: \: \: \: \: \: = 2 + 75 \\ \: \: \: \: \: \: \: \: \: = 77 \: \\16term \: of \: an \: ap \: is \: 77$