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已知2a=m,32b=n,a,b为正整数,求23a+10b的值.
下列计算正确的是 ( )
a 3 ÷ a 3 = a 6
a 3 ⋅ a 3 = a 6
( a 3 ) 3 = a 6
( a b 3 ) 2 = a b 6
若2x=3,2y=5,则2x+y= .
下列计算正确的是( )
x 2 + x 3 = x 5
2 x 3 − x 3 = 1
x 3 ⋅ x 4 = x 7
( − 2 x y 2 ) 3 = − 6 x 3 y 6
计算等于 ( )
若am=3,an=5,则am+n等于( )
下列运算正确的是 ( )
( − 3 a 2 ) 3 = − 9 a 6
( − a ) 2 ⋅ a 3 = a 5
( 2 x − y ) 2 = 4 x 2 − y 2
a 2 + 4 a 2 = 5 a 4
的运算结果正确的是( )
下列运算中,正确的是( )
a - 2 = - a 2
a 2 + a 3 = a 5
a 2 ⋅ a 3 = a 6
( a 2 ) 3 = a 6
下列运算中,正确的是 ( )
a 2 + a = a 3
( - ab ) 2 = - a b 2
a 5 ÷ a 2 = a 3
a 5 ⋅ a 2 = a 10
a 3 ⋅ a 3 = 2 a 3
( - 2 a ) 2 = 4 a 2
( a + b ) 2 = a 2 + b 2
( a + 2 ) ( a - 2 ) = a 2 - 2
a 2 ⋅ a 4 = a 8
− a ( a − b ) = − a 2 − ab
( − 2 a ) 2 ÷ ( 2 a ) − 1 = 8 a 3
( a − b ) 2 = a 2 − b 2
下列计算中正确的是( ).
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