Let S(n) the statement, 2 is a factor of
.
For n=1, 1^2 + 7(1) = 1 + 7 = 8, 1 is a factor of 8, then S(1) is true.
For n=2, we have 2^2 +7(2) = 4 +14 = 18, of course, 2 is a factor of 18, then S(2) is true.
For n=3, we have 3^2 +7(3) = 9 +21 = 30, of course, 2 is a factor of 30, then S(3) is true.
Answer:
Step-by-step explanation: l = 5 + w
p = 168
...
p = 2l + 2w
168 = 2(5+w) + 2w
168 = 10 + 2w + 2w
168 - 10 = 4w
158 = 4w
1 = 5 + 39.5