Question

VALUE OF 1-6 + 2-7 +3-8...... UPTO 100TERMS​

Answer 1

Step-by-step explanation:

-500

1–6=–5

2–7= –5

a=–5 d= 0 , an= –5 n= 100

Sn =n/2(a+an )

50× –10

–500

Answer 2

1-6+2-7+3-8+....+95-100

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

=-5*100

= -500

this the answer.

May be it will be helpful.