The sum of all natural numbers x that make the value of algebraic formula y = (x ^ 2 + 11) / x + 1 an integer is () a.6 B.11 c.12 d.13 The sum of all natural numbers x that make the value of algebraic formula y = (x ^ 2 + 11) / (x + 1) an integer is () A.6 B.11 C.12 D.13

The sum of all natural numbers x that make the value of algebraic formula y = (x ^ 2 + 11) / x + 1 an integer is () a.6 B.11 c.12 d.13 The sum of all natural numbers x that make the value of algebraic formula y = (x ^ 2 + 11) / (x + 1) an integer is () A.6 B.11 C.12 D.13


eleven



Let the value of algebraic expression 6 / x-3 be an integer of natural number, and the value of X be?


X-3=1,2,3,6
∴4,5,6,9



When x takes what value, x2-4x + 3x-4 is meaningful?


The denominator of the original fraction is X & sup2; - 4x + 6
x²-4x+6=(x²-4x+4)+2=(x-2)²+2
Because (X-2) & sup2; ≥ 0
So (X-2) & sup2; + 2 ≥ 2
Therefore, no matter what value x takes, the denominator X & sup2; - 4x + 6 ≥ 2, so the original fraction is meaningful