(111*222+444*888)/(222*444+333*666)=(111*111*2+444*444*2)/(222*222*2+333*333*2)=[(111²+444²)*2]/[(222²+333²)*2]=(111²+111²*4²)/(111²*2²+111²*3²)=[(111²)(1+16)]/[(111)²(4+9)]=17/13

\(P_1=\dfrac{1}{6}P=\dfrac{1}{6}.10m=\dfrac{1}{6}.10.0,25\approx0,42\left(N\right)\)

tui no gioi ve tra loi cau do nay dau

dap so 9 tick nha

I/ Choose the best option:

1) Peter puts on a..............because it is cold. (badge/sweater/hat)

2) William sometimes......................with his brother (fights/falls/dreams)

3) We went.............at the pond this morning. (shopping/fishing/gardening)

4) The..............gives us milk. (horse/pig/cow)

5) This orange is..............I do not want to eat it (hot/sour/salty)

I/ Choose the best option:

1) Alice is listening to her................... (doorbell/walkman/alarm clock)

2) The...............has a long trunk (giraffe/elephant/tiger)

3) The.................gives off a bad smell (rubbish/flower/perfume)

4) It is dangerous to swim in the....................(lift/canal/department store)

5) They are playing in the..........................on the beach (soap/sand/sugar)

Diện tích là:

( 56 x 43) : 2=1204 (cm²)

tick mình nha

\(\dfrac{x}{x^2-4}+\sqrt{x-2}=\dfrac{x}{\left(x+2\right)\left(x-2\right)}+\sqrt{x-2}\)có nghĩa khi:

\(\left(x+2\right)\left(x-2\right)\ne0\) và \(x-2\ge0\)

\(\Leftrightarrow x\ne\pm2\) và \(x\ge2\)

\(x>2\)

\(b,6^2:4.3+32:2^4\\ =36:4.3+32:16\\ =9.3+2\\ =27+2\\ =29\)

\(29=29^1\)

Số số hạng từ \(3\rightarrow79\) là:

\(\left(79-3\right):2+1=39\) ( số hạng )

\(\Rightarrow A=\dfrac{\left(79+3\right).39}{2}+100=1699\)