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Let f(x)={a^2+a+1}+b "cosec"^(-1)x where a in l and b > 0.If range of f(x) is [p, r) uu(r, q], then thevalue of p^2/(q^2+r^2)​ equals :-

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Solution :RANGE is `[-(BPI)/2,0) UU (0,(bpi)/2]`


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