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下列运算正确的是 ( )
( x 2 ) 3 = x 5
2 + 8 = 10
x · x 2 · x 4 = x 6
2 2 = 2
a 6 ÷ a 3 = a 3
a 4 · a 2 = a 8
( 2 a 2 ) 3 = 6 a 6
a 2 + a 2 = a 4
下列计算正确的是 ( )
a 6 + a 6 = 2 a 12
2 - 2 ÷ 2 0 × 2 3 = 32
( - 1 2 a b 2 ) · ( - 2 a 2 b ) 3 = a 3 b 3
a 3 · ( - a ) 5 · a 12 = - a 20
a 2 · a 3 = a 6
a 3 - a 2 = a
( a 2 ) 3 = a 5
a 3 ÷ a 2 = a
( - a 3 ) 2 = - a 6
a 8 ÷ a 2 = a 4
3 a 2 - 2 a 2 = a 2
x 2 + x 3 = x 5
x 2 · x 3 = x 6
x 3 ÷ x 2 = x
( 2 x 2 ) 3 = 6 x 6
下列各式中,计算正确的是 ( )
a 3 · a 2 = a 6
a 3 + a 2 = a 5
a 6 ÷ a 3 = a 2
( a 3 ) 2 = a 6
下列计算中,正确的是 ( )
a 4 + a 4 = a 8
a 4 · a 4 = 2 a 4
( a 3 ) 4 · a 2 = a 14
( 2 x 2 y ) 3 ÷ 6 x 3 y 2 = x 3 y
m 2 · m 3 = m 6
( m 4 ) 2 = m 6
m 3 + m 3 = 2 m 3
( m - n ) 2 = m 2 - n 2
下列各式计算正确的是 ( )
x + x 2 = x 3
x 6 ÷ x 2 = x 3
x · x 2 = x 3
已知 4 m = a , 8 n = b ,其中 m , n 为正整数,则 2 2 m + 6 n = ( )
a b 2
a + b 2
a 2 b 3
a 2 + b 3
下列各式正确的是 ( )
2 a 2 + 3 a 2 = 5 a 4
a 2 · a = a 3
a 2 = a
下列运算中正确的是 ( )
a 5 + a 5 = a 10
a 7 ÷ a = a 6
下列计算结果是 x 5 的为 ( )
x 10 ÷ x 2
x 2 · x 3
( x 2 ) 3
x 6 - x
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