1Find the domain of the function:

Exercise 1 In a square that has side a, by bringing together the middle of the sides,is formed a new square.

Solve the equation Write  x+1=t

For the given functions   and   . a)Show that in [1;+∞[ , f(x)≤g(x).

Find the sum of  n first numbers of the string  7,77,777,….

How many numbers has ?

1. Evaluate each of the following expressions using the propeties of logs (and no calculator)