This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
We have to take one value for each variable at a time.
a = ( 2 , − 2 , 4 ) , b = ( 0 , 8 , 4 ) , c = ( − 2 0 , − 4 , 8 )
So, the first value of 4 a + 1 2 b − 3 c is:
4 a + 1 2 b − 3 c = 4 × 2 + 1 2 × 0 − 3 × ( − 2 0 )
4 a + 1 2 b − 3 c = 8 + 0 + 6 0
4 a + 1 2 b − 3 c = 6 8
Second value of 4 a + 1 2 b − 3 c is:
4 a + 1 2 b − 3 c = 4 × ( − 2 ) + 1 2 × 8 − 3 × ( − 4 )
4 a + 1 2 b − 3 c = − 8 + 9 6 + 1 2
4 a + 1 2 b − 3 c = − 1 0 0
Third value of 4 a + 1 2 b − 3 c is:
4 a + 1 2 b − 3 c = 4 × 4 + 1 2 × 4 − 3 × 8
4 a + 1 2 b − 3 c = 1 6 + 4 8 − 2 4
4 a + 1 2 b − 3 c = 4 0
Thus, the answer is: 4 a + 1 2 b − 3 c = ( 6 8 , 1 0 0 , 4 0 )