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Single correct answer type question Q.1 Set of values of x satisfying the inequality (x - 3)(2x + 5)(x – 7) s 0 is (a, b) u (b, c] (x2 + x +1)(3x + 6) then 2a + b + c is equal to (A) 0 (B) 2 (C) 5 (D) 7 C . lity

JEE/Engineering Exams
Maths
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( frac{(x-3)^{2}(2 x+5)(x-7)}{left(x^{2}+x+1right)(3 x+6)^{2}} leq 0 ) ( Rightarrow(x-3)^{2}(2 x+5)(x-7) leq 0 quadleft(begin{array}{l}x^{2}+x+1 eq 0 8 x+6 x^{2}+x+1>0end{array}right) ) Critical points ( =-2,3,-frac{5}{2}, 7 ) ( frac{t+1---frac{---1}{3}+t+1}{frac{1}{2}-2}+frac{1}{7} ) ( 2 a+left[frac{-5}{2},-2right) cup(-2,7) ; a=-5, b=-2, c=7 ) 0 pfion ( (A) )
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