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下列运算正确的是( )
3x+2y=5(x+y)
x+x 3=x 4
x 2•x 3=x 6
(x 2) 3=x 6
下列运算正确的是 ( )
( a - 3 ) 2 = a 2 - 9
a 2 · a 4 = a 8
9 = ± 3
- 8 3 = - 2
下列计算正确的是( )
a 3﹣a=a 2
x 3•x 2=x 6
(﹣2a) 2=4a 2
x 2 n÷x n=x 2
下列计算正确的是 ( )
A. a 3 − a 2 = a B. a 2 · a 3 = a 6 C. ( 3 a ) 3 = 9 a 3 D. ( a 2 ) 2 = a 4
下列运算正确的是
A.B.C.D.
下列计算错误的是 ( )
A. a 2 ÷ a 0 · a 2 = a 4 B. a 2 ÷ ( a 0 · a 2 ) = 1
C. ( − 1 . 5 ) 8 ÷ ( − 1 . 5 ) 7 = − 1 . 5 D. − 1 . 5 8 ÷ ( − 1 . 5 ) 7 = − 1 . 5
a 3 + a 2 = a 5
a 3 ÷ a = a 3
a 2 · a 3 = a 5
( a 2 ) 4 = a 6
a 2 · a 5 = a 10
( a - 2 ) 2 = a 2 - 4
a 6 ÷ a 2 = a 3
( - a 2 ) 4 = a 8
)下列运算正确的是 ( )
a 2 · a 3 = a 6
( a 2 ) 3 = a 5
( 2 a ) 2 = 2 a 2
a 3 ÷ a 2 = a
a 8 ÷ a 4 = a 2
5 a - 3 a = 2 a
( - a b 2 ) 2 = - a 2 b 4
A.a2﹣a=aB.ax+ay=axyC.m2•m4=m6D.(y3)2=y5
A. a 3 + a 3 = a 6 B. 3 a − a = 3
C. ( a 3 ) 2 = a 5 D. a · a 2 = a 3
A. a 8 ÷ a 4 = a 2 B. ( a 2 ) 2 = a 4
C. a 2 · a 3 = a 6 D. a 2 + a 2 = 2 a 4
下列算式中,结果等于的是
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