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The second order derivative of the function x20 is

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Bihar STET Paper I: Mathematics (Held In 2019 - Shift 1)
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  1. 20x19
  2. 380x18
  3. 20x18
  4. 380x19

Answer (Detailed Solution Below)

Option 2 : 380x18
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Detailed Solution

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Calculations:

d/dx(xn) = nxn-1

d/dx(x20) = 20x19

d2/dx2 = 20 × 19 x18 = 380x18

Hence, The Correct Answer is option 2.

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