Giải các bất phương trình, hệ phương trình
a) \(\dfrac{x^2\left(3x-2\right)\left(x^2-1\right)}{\left(-x^2+2x-3\right)\left(2-x\right)^2}\ge0\)
b) \(\dfrac{x-5}{x-1}>2\)
c) \(2x-\sqrt{x^2-5x-14}< 1\)
d) \(x+\sqrt{x^2-4x-5}< 4\)
e) \(\left\{{}\begin{matrix}\left(4-x\right)\left(x^2-2x-3\right)< 0\\x^2\ge\left(x^2-x-3\right)^2\end{matrix}\right.\)
1. Use the correct tense and form of the verb provided to fit each gap
a) My brother used ____(write) an advice column in a magazine.
b) Linda promised _____(bring) Mike's book back.
c)Tim confessed ______(steal) the money from his neighbour.
d) Harry suggested ______(go) to the pub for lunch.
e) I'm sorry I _____(not write) to you so long.
f) There _____(be) a lot of traffic on the road to the city centre.
g) If I were you, I ____(not spend) so much money on the decoration.
h) Jane's train ______(arrive) at 7.00 tomorrow morning.
i) Hello Ben. I ______(phone) to ask if you _______(do) anything this Saturday.