Question

A={x€R|-1<x<2}
B = {x€R|x<3}
C = {x€R||x|<2}
D = {x€R|x+1>5}
E = {x€R|-2x+1>7}
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Answer 1

Răspuns:

A= ( -1;2)

B = ( - infinit; 3)

C= (-2;2)

x+1>5 |-1

x>4

D= (4; + infinit)

-2x+1>7 | -1

-2x>6 | : 2

- x>3 |• (-1)

x< -3

E= ( - infinit, - 3)