lf x(3−x)≥2, then sin−1(x)+sin−1(x2)+…+sin−1(x10)=
A
π2
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B
2π
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C
5π
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D
10π
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Solution
The correct option is C5π If x(3−x)≥2 x2−3x+2≤0 (x−1)(x−2)≤0 x belongs to[1,2] ........(i) But, We have −1≤x,x2,...,x10≤1 ...........(ii) from (i) and (ii) ⇒−1≤x≤1 Hence, x=1 =π2+.....+π2 =10×π2=5π