What is the minimum value of 4x2 + 16x - 17?

B - 29

C - 30

D - 33

E None

Solution

Correct Answer: Option D

f(x) = 4x² + 16x - 17
অন্তরীকরণ করে পাই,
dy/dx = 8x + 16
⇒ 8x + 16 = 0 [এখানে, dy/dx = 0]
⇒ 8x = -16
⇒ x = -2

x = -2 মানটি f(x) এ বসালে আমরা সর্বনিম্ন মান পাব।

f(-2) = 4(-2)² + 16(-2) - 17
= 4(4) - 32 - 17
= 16 - 32 - 17
= -33 

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