Recent content by kebstein

i think i have to factorize x2-10+21 x2-3x-7x+21 x(x-3)-7(x-3) (x-3) (x-7) x-3 is greater than or equal to 0 and x-7 is greater than or equal 0 there for x is greater than or equal to 3 and x is greater than or equal to7 then Df = [3; 7] is this correct

there is an error in my first question. it should f: x mapsto frac{1}{\\sqrt{x^2 - 10x + 21}')

yeah this is what i meant,

hi this is my first time here. i have just been admitted to the university of the gambia last month. i have a problem with this question. please i need help find the domain f is such that x maps to 1 all over the squareroot of x2-10x+12.