0 және не знаю как гOTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
Write the correct preposition, then complete the
sentences for you.
Write the correct preposition, then complete the
sentences for you.
Write the correct preposition, then complete the
sentences for you.
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
OTBET:
the afternoon, learn work
in lunchtime, I eat pizza and drink juice
in night, I watch TV or play mobile games
in weekend, I go to picnicin
Write the correct preposition, then complete the
sentences for you.
Write the correct preposition, then complete the
sentences for you.
Write the correct preposition, then complete the
sentences for you.
Write the correct preposition, then complete the
sentences for you.
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1. При каком значении x значение выражения 0,7^20x−5 равно 1 ?
2. При каком значении x верно равенство (16/9)^x+1=(3/4)^8
3. Решите уравнение 3^7−0,5x=81√ 3.
4.Найдите корень уравнения 8^x−1=4/√2
5.Найдите абсциссу точки пересечения графиков функций y=2,5^x+4 и y=(4/25)^x−2 .
ответ: 1. 0,25 , 2. - 5 , 3. 5 , 4. 1,5 , 5. 0.
Объяснение: Плавание вольным стилем
1. 0,7^(20x−5) =1
20x − 5 =0 ; 20x =5 ; x =5/20 =5*5 /20*5 =25 /100 = 0,25.
2. (16/9)^(x+1)=(3/4)^8 ; (4/3)²^(x+1) = (3/4)^8 ; (4/3)^2(x+1) = (3/4)^8 ;
(4/3)^2(x+1) = (3/4)^( -8) ; 2(x+1) = -8 ; x+1 = -4 ; x = -4 -1 ; x = -5 .
3. 3^(7−0,5x)=81√ 3 ; 3^(7−0,5x)=(3^4)*(3^0,5) ; 3^(7−0,5x)=3^(4+0,5) ;
7−0,5x = 4+0,5 ; - 0,5x = 4, 5 -7 ; - 0,5x = - 2, 5 ; x =5 .
4. 8^(x−1)=4/√2 ; (2³)^(x-1) =2² /( 2^ (1 /2) ) ; 2^( 3(x-1) ) =2 ^(2 -1/2) ;
3(x-1) ) =2 -1/2 ; x-1 = 1,5 /3 ; x = 1 +0,5 ; x = 1,5.
5. y=2,5^ (x+4) и y=(4/25)^(x−2) .
2,5^ (x+4) и y=(4/25)^(x−2) ; (5/2)^(x+4) = ( (2/5)² )^ (x−2) ;
(5/2)^(x+4) = ( (5/2)⁻² )^ (x−2) ; (5/2)^(x+4) = (5/2) ^ (-2 (x−2) ) ;
(5/2)^(x+4) = (5/2) ^ (-2x+4 ) ; x+4 = -2x+4 ; x+2x = 4-4 ; 3x =0 ; x=0.
D=4р²-84>0
4р²-84>0
4p²>84
p²>21
p₁>√21
р₂<-√21