Question

A=23 an= 5 n=10 find d

Answer 1

d is -2

Explanation:

From arithmetic progression:

`{ \bf{a_(n) = a + (n - 1)d }}`

substitute:

`{ \sf{5 = 23 + (10 - 1)d}} \\ { \sf{5 - 23 = 9d}} \\ { \sf{9d = - 18}} \\ { \sf{d = ( - 18)/(9) }} \\ \\ { \sf{d = - 2}}`

Answer 2

d=-2

Explanation:

a10=5, a10=a+(10-1)d

5=23+9d, d=-2