1214 ( б )
[ ( 7 ^ - 7 ) * ( 7 ^ - 8 )] / ( 7 ^ - 13 ) = ( 7 ^ - 15 ) / ( 7 ^ - 13 ) = 7 ^ - 2 = 1/49
Ответ 1/49
1215
а) [ ( 5 ^ 4 ) * ( 49 ^ - 3 ) ] / [ ( 7 ^ - 7 ) * ( 25 ^ 3 ) ] = [ ( 5 ^ 4 )*( 7 ^ - 6 ) ] /
/ [( 7 ^ - 7 )*( 5 ^ 6 )] = ( 5 ^ - 2 )* 7 = 7/25 = 0,28
Ответ 0,28
б) [ ( 81^12 )* ( 10^-7 ) ] / [ 10 ^-5 )*( 27 ^ 17 ) ] = [ ( 3^48 )*( 10^-7) ] / [ ( 10^-5)*( 3^51 ) ] = ( 3 ^ - 3 )*( 10 ^ - 2 ) = ( 1/27 )*( 1/100 ) = 1/2700
Ответ 1/2700