prosze po kolei napisac!!
a) [( - dwie trzecie ) do potegi 2 : osiem dziewiatych ] do pot. -1
b) 1,6 x siedem szesnastych - 2,7/33 ---> to jest w ułamku
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a)
[ (-2/3)^2 : (8/9) ]^(-1) = [ 4/9 * 9/8 ]^(-1) = [ 4/8 ]^(-1) = [ 8 / 4]^1 = 2^1 = 2
b)
1,6 * 7/16 - 2,7 / 33 = 16/10 * 7/16 - 2,7 : 33 =
7/10 - 27/10 * 1/33 = 7/10 - 9/110 =
77/110 - 9/110 = 68/110 = 34 / 55