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下列运算正确的是
A.B.C.D.
下列算式中,结果等于的是
下列运算正确的是( )
A.a2﹣a=aB.ax+ay=axyC.m2•m4=m6D.(y3)2=y5
A.(a5)2=a10B.x16÷x4=x4
C.2a2+3a2=5a4D.b3•b3=2b3
计算:a2•a4= .
8a﹣a=8
(﹣a) 4=a 4
a 3•a 2=a 6
(a﹣b) 2=a 2﹣b 2
下列计算正确的是 ( )
a 2 · a 3 = a 6
( x + y ) 2 = x 2 + y 2
( a 5 ÷ a 2 ) 2 = a 6
( - 3 xy ) 2 = 9 x y 2
下列运算正确的是 ( )
a 8 ÷ a 4 = a 2
5 a - 3 a = 2 a
( - a b 2 ) 2 = - a 2 b 4
x 2 · x 3 = x 6
x y 2 - 1 4 x y 2 = 3 4 x y 2
( 2 x y 2 ) 2 = 4 x y 4
a 2 + a 3 = a 5
( 2 a ) 3 = 8 a 3
a 3 ÷ a = a 3
a 3 · a 3 = a 9
a 6 ÷ a 3 = a 2
a 3 + a 3 = 2 a 6
( a 2 ) 3 = a 6
m 2 + 2 m = 3 m 3
m 4 ÷ m 2 = m 2
m 2 · m 3 = m 6
( m 2 ) 3 = m 5
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