Question

Rút gọn phân số

C= \(\frac{11\cdot12+22\cdot24+44\cdot48}{33\cdot36+66\cdot72+132\cdot144}\)

Answer 1

cầm nhật phương

Answer 2

\(C=\frac{11\cdot12+22\cdot24+44\cdot48}{33\cdot36+66\cdot72+132\cdot144}=\frac{12\left(11+44+132\right)}{12\left(99+396+1584\right)}=\frac{187}{2079}\)

Answer 3

C=\(\frac{11x12+2\left(11x12\right)+4\left(11x12\right)}{33x66+2\left(33x66\right)+4\left(33x66\right)}\) 

suy ra : C=\(\frac{11x22\left(1+2+4\right)}{33x66\left(1+2+4\right)}\)\(\Rightarrow\frac{11x22}{3\left(11x22\right)}\)\(\Rightarrow\frac{1}{3}\)

Answer 4

Tớ biết tớ sai rồi nha!xem bài của Hoàng Đức Thịnh

Answer 5

Ta có C=11.12+22.24+44.48/33.36+66.72+132.144

     C=11.12+11.2.12.2+11.4.12.4/3.11.12.3+11.6.12.6+12.11.12.12

     C=11.12(1+2.2+4.4)/ 11.12(1+3.3+6.6+11.12)

    C=1+2.2+4.4/1+3.3+6.6+11.12

     C=21/178