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4^x + 4^y = 1040 x + y = ?

Mathematics

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Answer

x+y=7x+y = 7

Step-by-step solution

6 steps
  1. Andika mlinganyo uliotolewa.

    Tunapewa mlinganyo:

    4x+4y=10404^x + 4^y = 1040

    Tunahitaji kutafuta thamani ya x+yx+y.

  2. Tafuta namba za 4 zinazowezekana.

    Tutaorodhesha namba za 4 (powers of 4) zilizo karibu na 1040:
    41=44^1 = 4
    42=164^2 = 16
    43=644^3 = 64
    44=2564^4 = 256
    45=10244^5 = 1024
    46=40964^6 = 4096

  3. Tambua thamani za xx na yy.

    Kutoka kwenye orodha, tunaona kuwa 1024 iko karibu sana na 1040.
    Tuchukue 4x=10244^x = 1024. Hii inamaanisha x=5x=5.
    Sasa, badilisha 4x=10244^x = 1024 kwenye mlinganyo wa awali:

    1024+4y=10401024 + 4^y = 1040
  4. Tatua kwa 4y4^y.

    Toa 1024 kutoka pande zote mbili za mlinganyo:

    4y=1040−10244^y = 1040 - 1024 4y=164^y = 16
  5. Tafuta thamani ya yy.

    Tunajua kuwa 42=164^2 = 16.
    Hivyo, y=2y=2.

  6. Kokotoa x+yx+y.

    Tumepata x=5x=5 na y=2y=2.

    x+y=5+2x+y = 5+2 x+y=7x+y = 7

    Hivyo, thamani ya x+yx+y ni 7\textbf{7}.

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