Question

  Giải nhanh giúp mik vs

Answer 1

\(a,9.\left(\dfrac{1}{3}\right)^2+\left(\dfrac{1}{7}\right)^0-1\\ =9.\dfrac{1}{9}+1-1\\ =\dfrac{9}{9}+1-1\\ =1+1-1\\ =1\\ b,7.\left(5^2-5\right)+\left(-1\right)^2\\ =7.\left(25-5\right)+1\\ =7.20+1\\ =140+1\\ =141\)

Answer 2

a: =9*1/9+1-1=1

b: =7*(25-5)-1=7*20-1=139

Answer 3

`a, 9 xx (1/3)^2 + (1/7)^0 - 1`

`= 9 xx 1/9 + 1 -1`

`= 1`

`b, 7(5^2-5) + (-1)^2`

`= 7 . 20 + 1`

`= 141`

Answer 4

a) 1

b) 141

Answer 5

`a)` `9.(1/3)^2+(1/7)^(o)-1`

`=9.(1)/(9)+1-1`

`=1`

`b)` `7.(5^(2)-5)+(-1)^2`

`=7.20+1`

`=140+1`

`=141`