Answer:
See explanation
Step-by-step explanation:
1 step:
n=1, then
So, for j=1 this statement is true
2 step:
Assume that for n=k the following statement is true
3 step:
Check for n=k+1 whether the statement
is true.
Start with the left side:
According to the 2nd step,
Substitute it into the
So, you have proved the initial statement
280 divided by 7 equals 40 and forty times 12 equals 480 so the answer is 480
N= 1
1(1-1)-4 = 0-4 = -4
n=2
2(2-1)-4= 2-4= -2
n=3
3(3-1)-4= 6-4= 2
n=4
4(4-1)-4= 12-4= 8
I don't understand.. but I think that I know why.. just give me a little more details about the question but here's my guess.:
It may be square root like the answer may be squared in order to answer a rectangular prism..
Or, it may be a power..
Sorry, I don't know if I was helping, but this is the best I could do b/c I don't know a lot about the problem
A=s^2
121 =s^2
s= 11
perimeter= 4s = 4(11) =44 m