Question

The first term of the AP is 10 and the 16th term is 0; Find the common difference
O A. -1.5
O B. 0.66666666667
O C.1.5
OD.-0.66666666667​

Answer 1

a= 10 16th term= 0

t n = a+(n-1)d

t 16 = 10 + 15*d

= 10+15d

15d = -10

d = -2/3

= -0.66667

correct answer option d

Answer 2

a+d=10

a+15d=0

-14d=10

d=-10/14=-5/7