87. if a^2+b^2+c^2=2 then the rang of ab+bc+ca is (1) [-1/2,1,] (2) [-1/2,oo] (C) ...
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Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW 87. if a^2+b^2+c^2=2 then the rang of ab+bc+ca is (1) [-1/2,1,] (2) [-1/2,oo] (C) [-1/2] (4) [
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