Question

is the common difference in an ap is minus 6 find a16-a12

Answer 1

d=-6

given a16-a12

so

a+15d-(a+11d)

a+15d-a-11d

15d-11d---------------------¥

put d=-6 in eqn ¥

15×-6-11×-6

-90+66

so a16-a12= -24

hope this will help you