If `x_i` and `f_i` are numerically large numbers, then which methods are appropriate to use?

If x_1 and f_i are sufficiently small, then which method is an appropriate choice?

Which method is used to estimate sulphur?

I have tied my square bathroom wall with congruent square tiles. All the tiles are red, except those along the two diagonals, which are all blue. If I used 121 blue tiles, then the number of red tiles I used are

If A={x|x is prime number and x<30}, find the number of different rational numbers whose numerator and denominator belong to Adot

A system of classification in which a large number of traits are considered is