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Computer mathematics problems
Prove:

Just use the unequal relationship between the sides of the triangle (after any two sides of the triangle, it is greater than the third side)

∵AP+BP & gt； abdominal muscle

BP+PC & gt； B.C.

PC+AP & gt； alternating current

The above three formulas add up to get.

2 *(AP+BP+CP)& gt； (ab+bc+ca)

Namely: (pa+pb+pc)> 1/2(ab+bc+ac)

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