The value of ? = 30

Logic == Multiple first 2 numbers and add oddnumber in the increasing order of the equations

6 , 2, 17 === 6*2 + 5 == 17

1, 4, 11=== 1*4 + 7 == 11

3, 7, ? === 3*7 + 9 == 30

The number tat is added to the multiplied value is increasing in hte order of ordd numbers,