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(b)
In triangle PSQ,
PQ+QS>PS. (i)
In triangle PSR,
PR+SR>PS. (ii)
Adding equations i and ii ,we get,
PQ+QS+PR+SR>2PS
PQ+QR+RP>2PS
In triangle PSQ,
PQ+QS>PS. (i)
In triangle PSR,
PR+SR>PS. (ii)
Adding equations i and ii ,we get,
PQ+QS+PR+SR>2PS
PQ+QR+RP>2PS
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