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The operation * on the set R of real number is defined by x *...

Mathematics
JAMB 2017
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
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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.

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Explanation Video

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