Question

7.Find the 15th term in the series 20,15,10,......
(a)-45
(b)-50
c)-55
(d)0​

Answer 1

the answer is

(b)-50

I hope it works

Answer 2

Step-by-step explanation:

$a = 20 \\ \\ d = - 5 \\ \\ 15th \: term \: will \: be \: a + 14d \\ \\ = 20 + 14( - 5) \\ \\ = 20 - 70 \\ \\ = - 50.....$

therefore.....15 th term is -50....

hope it helps.......✌✌