Найдите значение выражения x+y+z, если:
2ˣ=1/8; 3ʸ=1; (−5)ᶻ=1/25.

  1. 3
  2. 5
  3. −5
  4. 0

📝 Detailed explanation

Из равенства 2ˣ=1/8=2⁻³ получаем x=−3.
Из равенства 3ʸ=1 следует, что y=0.
Так как (−5)ᶻ=1/25=(−5)⁻², то z=−2.
Следовательно, x+y+z=−3+0−2=−5.
9 / 10 (90%)
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