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Diberikan segi – 4 sembarang ABCD dengan X dan Y adalah masing – masing titik tengah diagonal AC dan BD. Jika u = A B , v = A C dan w = X Y , maka A D = ....

Diberikan segi – 4 sembarang ABCD dengan X dan Y adalah masing – masing titik tengah diagonal AC dan BD. Jika  dan  , maka  = ....

  1. begin mathsize 14px style negative 1 half u with rightwards arrow on top plus 1 half v with rightwards arrow on top plus w with rightwards arrow on top end style   

  2. begin mathsize 14px style negative 2 u with rightwards arrow on top plus v with rightwards arrow on top minus 2 w with rightwards arrow on top end style   

  3. begin mathsize 14px style 2 u with rightwards arrow on top plus v with rightwards arrow on top plus 2 w with rightwards arrow on top end style   

  4. begin mathsize 14px style negative 2 u with rightwards arrow on top minus v with rightwards arrow on top plus 2 w with rightwards arrow on top end style   

  5. begin mathsize 14px style negative u with rightwards arrow on top plus v with rightwards arrow on top plus 2 w with rightwards arrow on top end style         

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begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell u with rightwards arrow on top end cell equals cell stack A B with rightwards arrow on top comma space v with rightwards arrow on top equals stack A C with rightwards arrow on top space dan space w with rightwards arrow on top equals stack X Y with rightwards arrow on top end cell row cell w with rightwards arrow on top end cell equals cell stack X Y with rightwards arrow on top end cell row cell w with rightwards arrow on top end cell equals cell stack X A with rightwards arrow on top plus stack A D with rightwards arrow on top plus stack D Y with rightwards arrow on top end cell row cell w with rightwards arrow on top end cell equals cell 1 half open parentheses stack C A with rightwards arrow on top close parentheses plus stack A D with rightwards arrow on top plus 1 half open parentheses stack D B with rightwards arrow on top close parentheses end cell row cell w with rightwards arrow on top end cell equals cell 1 half open parentheses stack C A with rightwards arrow on top close parentheses plus stack A D with rightwards arrow on top plus 1 half open parentheses stack D A with rightwards arrow on top plus stack A B with rightwards arrow on top close parentheses end cell row cell w with rightwards arrow on top end cell equals cell 1 half open parentheses negative v with rightwards arrow on top close parentheses plus stack A D with rightwards arrow on top plus 1 half open parentheses negative stack A D with rightwards arrow on top plus u with rightwards arrow on top close parentheses end cell row cell w with rightwards arrow on top end cell equals cell negative 1 half v with rightwards arrow on top plus stack A D with rightwards arrow on top minus 1 half stack A D with rightwards arrow on top plus 1 half u with rightwards arrow on top end cell row cell w with rightwards arrow on top end cell equals cell 1 half u with rightwards arrow on top minus 1 half v with rightwards arrow on top plus 1 half stack A D with rightwards arrow on top end cell row cell 1 half stack A D with rightwards arrow on top end cell equals cell negative 1 half u with rightwards arrow on top plus 1 half v with rightwards arrow on top plus w with rightwards arrow on top end cell row cell stack A D with rightwards arrow on top end cell equals cell negative u with rightwards arrow on top plus v with rightwards arrow on top plus 2 w with rightwards arrow on top end cell end table end style        

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[SPMB 2004] Diketahui bidang empat ABCD. D A = a , D B = b , D C = c .Jika titik Q pada AB dengan AQ : QB = 1 : 2, dan titik R pada BC dengan BR : RC = 1 : 2 maka QR ​ = ....

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