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zhartaeva2014
@zhartaeva2014
September 2021
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Решите степень с произвольным показателем помогите пожалуста а) 81^-0,75+(1/125)-^1/3-(1/32)^-3/5 б)0,001^-1/3-(-2)^-2+64^2/3-8-1 1/3+(9)^2
в)27^2/3+(1/16)^-0,75-25^-0,5 дам 60 баллов срочно
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ludmilagena
Verified answer
1) 81=3^4; 0,75=3/4; 32=2^5; 125=5^3;
81^-0,75 +(1/125)^-1/3 -(1/32)^-3/5 = 3^(-4*3/4) +(1/5)^(-3/3)-(1/2)^(-5*3/5)=
=3^-3 +(1/5)^-1 -(1/2)^-3 = 1/3^3+5 -2^3 =1/27+5-8= - 3+1/27= -2 26/27
2) 0,001=0,1^3; 64=4^3; 8=2^3;
0,001^-1/3 - (-2)^-2 +64^2/3 - 8^(-1/3) +9^2=
=0,1^-1 - 1/4 + 4^2 - 1/2 +81=10-3/4+16+81=107-3/4=106 1/4
3) 27=3³; 16=2^4; 0,75=3/4; 25=5²; 0,5=1/2;
27^2/3 +(1/16)^-0,75 - 25^-0,5 =3^(3*2/3) + 2^(4*3/4) -5^(-1)=
=3^2 +2^3 -1/5= 9+8-1/5=17-1/5=16 4/5
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Answers & Comments
Verified answer
1) 81=3^4; 0,75=3/4; 32=2^5; 125=5^3;81^-0,75 +(1/125)^-1/3 -(1/32)^-3/5 = 3^(-4*3/4) +(1/5)^(-3/3)-(1/2)^(-5*3/5)=
=3^-3 +(1/5)^-1 -(1/2)^-3 = 1/3^3+5 -2^3 =1/27+5-8= - 3+1/27= -2 26/27
2) 0,001=0,1^3; 64=4^3; 8=2^3;
0,001^-1/3 - (-2)^-2 +64^2/3 - 8^(-1/3) +9^2=
=0,1^-1 - 1/4 + 4^2 - 1/2 +81=10-3/4+16+81=107-3/4=106 1/4
3) 27=3³; 16=2^4; 0,75=3/4; 25=5²; 0,5=1/2;
27^2/3 +(1/16)^-0,75 - 25^-0,5 =3^(3*2/3) + 2^(4*3/4) -5^(-1)=
=3^2 +2^3 -1/5= 9+8-1/5=17-1/5=16 4/5