Question

If 2nd term of an ap is 4th and 7th term is -11 find the 16th term

Answer 1

Step-by-step explanation:

an=4,an-11

an=a+3d

4=a+3d.......1

an=a+6d

-11=a+6d........2

4=a+3d

-11=a+6d

by elimination method, we get d=-5

by sustituting in 1, we get a=19, 16 th term= a+15d

19+(-15 x 5)

19-75=-56