Answer:
Step-by-step explanation:
The answer is actually
Let:
S=1+2+3+4+5+6+7+8+9+n
We know the answer to the following infinite sum:
S2=1-1+1-1+1-1+1-1+1-1+1-1+1-....= - 1/2
We can therefore solve for this sum:
S3=1-2+3-4+5-6+7-8+9-....
We add them:
S3= 1-2+3-4+5-6+7-8...
S3= +1-2+3-4+5-6+7-8...
________________
2S3= 1-1+1-1+1-1+1-1+1-....
Therefore:
2S3=S2=
Well i think it is true,because when you Multiplying you will not have a one decimal place
Answer:
Step-by-step explanation:
I'm taking this to mean
x = 0.255555555555... If this is not correct, leave a note. Multiply by 100
100 x = 25.55555555555555 ... Divide by 10
10x = 2.55555555555555 ... Subtract
90 x = 23
x = 23/90
Try putting 23/90 in your calculator. You will find it is 0.25555555... just what you were given
