sin(x+pi)=m+2/m+1

\(5\sqrt{x^3+1}=2\left(x^2+2\right)\)

Cho A=\(\frac{x+2}{x\sqrt{x}-1}+\frac{\sqrt{x}+1}{x+\sqrt{x}+1}\)

B=\(\frac{1}{\sqrt{x}-1}\) ( với x>=0;x khác 1)

a) Tính B khi x=49

b) Tính B khi x=\(4-2\sqrt{3}\)

c) Rút gọn S=A-B

d) So sánh S và \(\frac{1}{3}\)

make question

1. they take part in "walking for fun" club

2. they go hiking on weekend

3. my father will go to hanoi next monday

4. my sister help mother whit the housework

Change the following commands and exclamations into Reported Speech. Use the past forms of the reporting verbs in brackets

1. "See me tomorrow afternoon" (order)

=> Her boss __________________

2. "Happy New Year" (wish)

=> Mary _____________________

3. "Lie down and stop barking" (order)

=> Tom _______________________

4. "Put on your sweater, it's getting cold" (tell)

=> His mother ___________________

5. "Dont touch that wall. Ive just finished painting it" (warn)

=> My father _______________________

6. "Go on, apply for the job , Paul" (urge)

=> Karen _________________________

7. Could you tell me the way to London Street ?

=> He inquired __________________

8. Can you start next Monday ?

=> The manager asked ________________

9. Tom said to Jane: "Can you help me with my pronunciation ?"

=> Tom told ___________________

a) \(\dfrac{1}{x^2+x}+\dfrac{1}{x^2+3x+2}+\dfrac{1}{x^2+5x+6}+\dfrac{1}{x^2+7x+12}\)

b) \(\dfrac{1}{x^2+3x+2}+\dfrac{1}{x^2+5x+6}+\dfrac{1}{x^2+7x+12}+\dfrac{1}{x^2+9x+20}\)

a) \(\dfrac{1}{\left(x-y\right)\left(y-z\right)}+\dfrac{1}{\left(y-z\right)\left(z-x\right)}+\dfrac{1}{\left(z-x\right)\left(x-y\right)}\)

b) \(\dfrac{1}{x\left(x-y\right)\left(x-z\right)}+\dfrac{1}{y\left(y-z\right)\left(y-x\right)}+\dfrac{1}{z\left(z-x\right)\left(z-y\right)}\)

c) \(\dfrac{x^2}{\left(x-y\right)\left(x-z\right)}+\dfrac{y^2}{\left(y-x\right)\left(y-z\right)}+\dfrac{z^2}{\left(z-x\right)\left(z-y\right)}\)