Answer:
75%
Step-by-step explanation:
45/60 x X/100
45x100
4500/60
75%
Answer: 178.31
Step-by-step explanation: subtract 574.54 by 396.23
The education is (x-h)^2 + k ands the vertex is (h,k)
Let's start from what we know.
Note that:
(sign of last term will be + when n is even and - when n is odd).
Sum is finite so we can split it into two sums, first
with only positive trems (squares of even numbers) and second
with negative (squares of odd numbers). So:
And now the proof.
1) n is even.
In this case, both
and
have
terms. For example if n=8 then:
Generally, there will be:
Now, calculate our sum:
So in this case we prove, that:
2) n is odd.
Here,
has more terms than
. For example if n=7 then:
So there is
terms in
,
terms in
and:
Now, we can calculate our sum:
We consider all possible n so we prove that: