Sagot :
Bonjour
Simplifier cette expression :
f(n-1)=(n-1)²– (n-1) +4
fn - f = n² - 2n + 1 - n + 1 + 4
fn - f = n² - 3n + 6
fn - f - n² + 3n - 6 = 0
Bonjour
Simplifier cette expression :
f(n-1)=(n-1)²– (n-1) +4
fn - f = n² - 2n + 1 - n + 1 + 4
fn - f = n² - 3n + 6
fn - f - n² + 3n - 6 = 0