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Finding critical numbers

  • #1
Find all critical numbers if any.

I found the critical number -1/3 , just checking my work. Any input would be great.

the function f(x) = x*sqrt2x+1
f'(x) = (3x+1)/sqrt2x+1

3x+1 = 0 , x = -1/3
 

Answers and Replies

  • #3
Critical numbers are -1/3 and -1/2
 

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