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C

A

a.\(\dfrac{7}{10}\)
b.\(\dfrac{13}{8}\)

1.will visit
2.is playing
3.watches
4.will go
5.fixing
6.are doing
7.learns
8.am trying
9.will write
10.came

=200

B

60 độ

\(f\left(1\right)=2.1-3=2-3=\left(-1\right)\)
\(f\left(-2\right)=2.\left(-2\right)-3=\left(-4\right)-3=\left(-7\right)\)
\(f\left(-3\right)=2.\left(-3\right)-3=\left(-6\right)-3=\left(-9\right)\)