5. If x = 1 + 2 + 3 + ... + 2000, then value of x is :
(a) 200100
(b) 20010
(c) 2001
(d) 2001000
pls answer wz steps
Answers
Answered by
0
Answer:
answer d
Step-by-step explanation:
x=1+2+3+......+2000
this is an ap
sigma n =(2000 X 2001)/2
4002000/2
2001000
Answered by
0
Step-by-step explanation:
n= 2000 a= 1 d= 1
sum of 2000 terms = n/2 (2a+n-1)d
2000/2 ( 2 (1)+ 2000-1×1)
1000 (2 + 1999)
1000× 2001
2001000
therefore option d is the answer
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