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TIMO 2019 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 3 Question 13

TIMO · TIMO 2019 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 3

Question 13

For real $x$, find the maximum of $\frac1{\sqrt{2x^2+32x+199}}$.
  1. $\sqrt{70}/70$
  2. $\sqrt{135}/135$
  3. $\sqrt{134}/134$
  4. $\sqrt{71}/71$