Question

4. The sum of all the terms and its 6th term of an Arithmetic
Progression is 0, if its first term is –15 the number of its
terms are​

Answer 1

Answer:

so it

Step-by-step explanation:

Here, sum of all terms =750

2

n

​  

(a+l)=750

2

n

​  

(15+85)=750

n=15

Now, a  

15

​  

=85

a+14d=85

d=5

Thus, a  

6

​  

=a+5d=15+25=40