# GATE Papers >> CSE >> 2008 >> Question No 8

Question No. 8

Given f1, f3 and f in canonical sum of products form (in decimal) for the circuit

f1 = ${\sum }_{}$m (4, 5, 6, 7, 8)
f3 = ${\sum }_{}$m (1, 6, 15)
f = ${\sum }_{}$m (1, 6, 8, 15)
then f2 is