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If y = x² – 3x + 4, find dy/dx at x = 5
- A. 9
- B. 3
- C. 5
- D. 7
QUICK ANSWER…
D
SOLUTION…
Here, we are required to differentiate, and then substitute 5 for x in the answer gotten from the differentiation.
Now for the right answer to the above question:
- Option A is incorrect.
- Option B is incorrect.
- C is incorrect.
- D is the correct answer.
QUICK TIPS…
You may please note these/this:
- Any number raised to the power of zero is = 1
- Any number raised to the power of 1 is = the same number.
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/ culled from 2015 JAMB-UTME mathematics past question 17 /
