|
Garage Queen
Join Date: Dec 2008
Location: The Midlands, SC
Posts: 2,445
|
The solution:
We are given that a * b= a - 3b. To evaluate 4*3, we must recognize that a corresponds to 4 and b corresponds to 3.
If a*b=a-3b, 4*3=4-3(3)=-5
Since 4*3=-5, (4*3) #5 = -5#5
To evaluate -5#5, we see that a#b=2a+3b, and recognize that, in this case, a corresponds to -5 and b corresponds to 5.
If a#b = 2a+3b, -5#5 = 2(-5)+3(5)=5
So, (4*3)#5=5
__________________
Stephanie
'21 Model S Plaid, '21 Model 3 Performance '13 Focus ST,
Off to a new home: '16 Focus RS,'86 911 Targa 3.4, '87 930, '05 Lotus Elise, '19 Audi RS3,
|