求值:log2 (5/56)^(1/2)+log2 (14)-(1/2)log2 (35)=
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求值:log2 (5/56)^(1/2)+log2 (14)-(1/2)log2 (35)=
log2中2为底数
=1/2[-2log2 (7)-3]+log2 (2)+log2 (7) 中的1/2[-2log2 (7)-3]是怎么得到的?
log2中2为底数
=1/2[-2log2 (7)-3]+log2 (2)+log2 (7) 中的1/2[-2log2 (7)-3]是怎么得到的?
既然问道我了,就再写详细些:
=1/2(log2 [7^(-2)*2^(-3)]+log2(2*7)
=1/2[(log2 7^(-2)+log2 2^(-3)]+log2 (2*7)
=1/2log2 7^(-2)+1/2log2 2^(-3)]+log2 (2*7)
=1/2*2*log2 7+1/2*(-3)log2 2+log2 (2*7)
=1/2[-2log2 (7)-3]+log2 (2)+log2 (7)
log2 (5/56)^(1/2)+log2 (14)-(1/2)log2 (35)
=1/2log2 (5/56)-1/2log2 (35)+log2 (14)
=1/2[log2 (5/56/35)]+log2 (14)
=1/2log2 [1/(7^2*8)]+log2 (14)
=1/2(log2 [7^(-2)*2^(-3)]+log2(2*7)
=1/2[-2log2 (7)-3]+log2 (2)+log2 (7)
=-log2 (7)-3/2+1+log2 (7)
=-1/2
=1/2(log2 [7^(-2)*2^(-3)]+log2(2*7)
=1/2[(log2 7^(-2)+log2 2^(-3)]+log2 (2*7)
=1/2log2 7^(-2)+1/2log2 2^(-3)]+log2 (2*7)
=1/2*2*log2 7+1/2*(-3)log2 2+log2 (2*7)
=1/2[-2log2 (7)-3]+log2 (2)+log2 (7)
log2 (5/56)^(1/2)+log2 (14)-(1/2)log2 (35)
=1/2log2 (5/56)-1/2log2 (35)+log2 (14)
=1/2[log2 (5/56/35)]+log2 (14)
=1/2log2 [1/(7^2*8)]+log2 (14)
=1/2(log2 [7^(-2)*2^(-3)]+log2(2*7)
=1/2[-2log2 (7)-3]+log2 (2)+log2 (7)
=-log2 (7)-3/2+1+log2 (7)
=-1/2
log2底根号5/56+log2(14)-1/2log2(35)
log2 SQR(7/48)+log2 12 -1/2log2 48
log2 SQR(7/48)+log2 12 -1/2log2 42
解方程log2(2-x)=log2(x-1)+1
log2 (x + 3) + log2(x + 2) = 1
根号下{[log2 (5)]^2-4log2(5)+4}+log2(1/5)
log2(根号下7/48)+log2(12)-1/2log2(42)-1=?
log2√5/56+log^14-1/2log2^35 (2lg2+lg3)/(2+lg0.36+2lg2)
(log2 9)/(log2 8) = 2/3(log2 3)
2^log2 (3) × log2 (1/8) + 2lg3
log2的5次方+log2的1/10次方=?
不等式log2(2x+3)>log2(x+1)的解集是