Question

find the value of 5+(-5)+5+(-5)+5.....191th term​

Answer 1

Answer:

-5

Step-by-step explanation:

if 5+(-5) is repeated for 2 times then the answer is 0

And if thesame thing is repeated for 190 times then also the answer is 0

so,

0+-(5)=-5

hence the answer is -5

Answer 2

Answer:

1905

Step-by-step explanation:

5+(-5)+5+(-5).......

a=5 d=10 n=191

an=a+(n-1)d

an=5+(191-1)10

an=5+190*10

an=5+1900

an=1905