Question

tìm x thuộc N biết:

a, 36 chia hết cho x+1

b, 25 chia hết cho 2x+1

 

Answer 1

a, 36 chia hết cho x+1

=> x + 1 E Ư(36) = {1;2;3;4;6;9;12;18;36}

=> x = {0;1;2;3;5;8;11;17;35}

b,25 chia hết cho 2x+1  tương tự

Answer 2

a) 36 chia hết cho x + 1 \(\Rightarrow x+1\inƯ\left(36\right)=\left\{1;2;3;4;6;9;12;18;36\right\}\)

\(\Rightarrow x\in\left\{0;1;2;3;5;8;11;17;35\right\}\)

a) 25 chia hết cho 2x + 1 \(\Rightarrow2x+1\inƯ\left(25\right)=\left\{1;5;25\right\}\)

\(\Rightarrow2x\in\left\{0;4;24\right\}\)\(\Rightarrow x\in\left\{0;2;12\right\}\)

Answer 3

tìm Ư là OK

Answer 4

vi 36 chia het cho x+1 suy ra( x+1) thuoc U(36)

u(36)= { 1, 2,3,4,6,9,12,18,36 }

Suy ra x+1thuoc{1,2,3,4,6,9,12,18,36} Suy ra x thuoc {0,1,2,3,5,8,11,17,35}

      Vay x thuoc {0,1,2,3,5,8,11,17,35}