Answer:
This sum is the sum of an arithmetic sequence. There is a formula for the sum of an arithmetic sequence which can be looked up or derived by a variety of means.
A nice approach for this sequence is the following. Notice that the sum of first and last number in the sequence is the same as the sum of the second and second last, and also the same as the sum of the third and third last, and so on.
There are n of these pairs. So the desired sum is n x (first number + last number). But the first number is 1 and the last on is 2n. Thus the desired sum is n(1 + 2n).
Hope this helps!!
Mark Brainleast!!!!!!!!!!!
Step-by-step explanation:
A 55ttty65t78with city council spokeswoman said that in August
The quadrilateral is either a square or a rectangle as all angles are the same measure (90 degrees)
Answer:
your answers are already matched up
Step-by-step explanation:
X/x-2 >= 0 equals x/x >= 0+2 simplified x >=2
