A={x thuộc r | 2x^2 - 3x +1 } và b={x thuộc r | | 2x -1 | =1} . Tìm AUB
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Step-by-step explanation:

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answer:

the measure of the arc st is 130°

step-by-step explanation:

step 1

find the value of x

we know that

∠sor+∠rot+∠tou=180°

substitute the values

(9x+5)°+(13x+15)°+(9x+5)°=180°

solve for x

(31x+25)°=180°

31x=180°-25°

x=155°/31=5°

step 2

find the measure of the arc st

we know that

arc st=∠sor+∠rot > by central angle

substitute the values

arc st=(9x+5)°+(13x+15)°

arc st=(22x+20)°

substitute the value of x

arc st=(22(5)+20)=130°