Question

calcule o valor das expressões
$45 + 5 {}^{2}$
$- 28 + 10 {}^{2}$
$- 17 - 1 {}^{5} - 6$
$- 5 {}^{2} + 1 - 74 {}^{0}$
$( - 2) {}^{4 + ( - 4) {2}^$
$( - 2) {}^{3 + (1 - ) {9}^{} }$

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Answer 1

a) √(121/100)+ √(81/25) =11/10+9/5 =29/10  

b) √(49/64)  - √(625/144)+ √(1/36)- √(16/9)=7/8-25/12+1/6-4/3 = (21-50+4-32)/24 = -57/24  

c) √(1/4)  - √(1/9)  .√(9/16)+ √(49/25)  .√(25/36)=1/2-1/3.3/4+7/5.5/6=1/2-3/12+35/30=1/2-1/4+7/6=(6-3+14)/12 = 17/12

d) √(1/4)+ √(1/9)+ √(1/16)- √(1/25)- √(1/36)=1/2+1/3+1/4-1/5-1/6=(30+20+15-12-10)/60=43/60  

e) 2/√81-√16/3+2/√25-√36/3=2/9-4/3+2/5-6/3=(10-60+18-90)/45 = -122/45

f) √(4/25)- √(1/9)  + √(9/25)- √(4/9)=2/5-1/3+3/5-2/3=(6-5+9-10)/15 = 0/15 = 0