Question

find the 12 term from the end of the A.P=-2,-4,-6,.....,-100

Answer 1

a =-2
d=-2
l=-100
Now for 12th term from end we have to take the last term of the AP as first term and "d" will become positive.
So we get 12th term from the end of the given AP =-100+11×2=-100+22=-78