Fix the error formula

Exercise and reference answers

Questions

1. Statement parts

   1. dP/P
   2. =
   3. dF/F
   4. -
   5. 2
   6. dR/R

   Correction

   plus — errors add when you maximise them, never subtract

   Incorrect part

   -

2. Statement parts

   1. dP/P
   2. =
   3. dF/F
   4. +
   5. 1
   6. dR/R

   Correction

   2 — R is squared, so its error counts twice

   Incorrect part

   1

Instructions

One token in each line is wrong. Tap it, then read the correction.