(8/9+1/3-2/27)×2.
1/2,3/4,8/9,16/27,( ) ( ),
9^x-8•3^(x+1/2)-27
(1)3,9,27,81,243,729 ..(2) 1,7,25,79,241,727..(3) 1,3,9,27,8
(27/8)^-2/3+0.002^-1/2-10*((5^(1/2))-2)^-1+14/9
9^8*27^2/(-3)^18
1/2,3/4,8/9,( ),81/32,( ),( ) 27/64,9/16,3/4,( ),( ) 找规律
(1×2×4+2×4×8+3×6×12)÷(1×3×9+2×6×18+3×9×27)
(-27/8)^3+(2-根号三)^0-1/9*log2^9*log3^4等于多少
(27/8)^x-1乘(2/3)^2x-3=4/9,求x
7/9*5/6/14/27 1/2*2/5+9/10/9/20 5/8*1/4/5/8*1/4 (1/2+2/3+3/4
3/4+1/4-3/4-1/4 (5/8+2/27)*8+11/27 36*(7/9+5/6)÷58 2/3*3/5-1
计算.(9分之8+1又1分之3-1又27分之2)×27