Matematika

Pertanyaan

-160-158-156-...-2+0+2+...+100

1 Jawaban

  • (-160-158-156.. -2) x-1=2+4+... 160
    160+2=162=162/ps
    jml bil=(160-2: 2) +1=80: 2=40 PS
    40psx162=6480
    648x-1=-6480


    2+4+... +100
    100+2=102=102/ps
    jml bil=(100-2: 2) +1=50, 50: 2=25 PS
    25ps x 102=2550

    -6480+2550=-3930

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