X=2
Hope that helps!
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Answer:
1. A
2. C
Step-by-step explanation:
It is easy try to figure it.
If you did not figure it out the answer is
A. I think is 24 not sure.
B. I think it is 18 not sure.
Step-by-step explanation:
this is an arithmetic sequence :
a1 = 1
an = an-1 + 2 = a1 + (n-1)×2
the sum of n terms of an arithmetic sequence is
S = n×(a1 + an)/2
n = 5000
an = a1 + 4999×2 = 9999
S = 5000×(1 + 9999)/2 = 5000×5000 = 25,000,000
