Hello, I know this isn’t a homework question but I am not able to skip this activity right here and I can’t seem to find out why
. The guy speaking kept saying “Use the tool to help solve the linear system of equations” but I can’t seem to understand what tool . Is this some sort of glitch?
1 answer:
You might be interested in
Odd numbers take the form , where
is an integer. When
, the last odd number would be 799. So we're adding
By reversing the order of terms, we have
and we can pair up terms in both sums at the same position to write
so that we are basically adding 400 copies of 800, and from there we can find the value of the sum right away:
###
We could also make use of the formulas,
We have
So, the answer to this problem is x = 9/2 or x = 4.5.
