pp3-1 Q5

[william0904]

5.
+ x y z
4 1 -5 m
e 7 N 10
f 2 -4 5


In the addition table shown above, what is the value of m+n?

a.-19
b.4
c.5
d.6
e.22

ANS:c

27. As shown in the figure above, a thin conveyor belt 15 feet long is drawn tightly around two circular wheels each 1 foot in diameter. What is the distance, in feet, between the centers of the two wheels?



a.15-π/2
b.5π/4
c.15-2π
d.15-π
e.2π

ANS:A

請各位高手相助

[gman]

第一題
+ x y z
4 1 -5 m
e 7 N 10
f 2 -4 5

那個最左上角的+ 就是這個矩陣裡面的東西行列相加而已
so x+4=1 x=-3 y+4=-5 y=-9 以此類推 慢慢推 推出 N=1 m=4 ==>ans: 5