The operation * on the set R of real number is defined by x * y = 3x + 2y − 1, find 3* − 1
-
A.
9 -
B.
– 9 -
C.
6 -
D.
– 6
Correct Answer: Option C
Explanation
x * y is an operation on 3x + 2y − 1
Find 3A − 1
x = 3, y = −1
3 * − 1 on 3x + 2y − 1
3(3) + 2(−1) −1
= 9 − 2 − 1
= 6
There is an explanation video available below.