计算(1)【(x²)²】²(2)比较大小:81³与274(3)计算;(2a&su
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计算(1)【(x²)²】²(2)比较大小:81³与274(3)计算;(2a³b4)²+(-
3)(2a³b4)²+(-
3)(2a³b4)²+(-
![计算(1)【(x²)²】²(2)比较大小:81³与274(3)计算;(2a&su](/uploads/image/z/18522244-28-4.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%881%EF%BC%89%E3%80%90%EF%BC%88x%26sup2%3B%EF%BC%89%26sup2%3B%E3%80%91%26sup2%3B%EF%BC%882%EF%BC%89%E6%AF%94%E8%BE%83%E5%A4%A7%E5%B0%8F%EF%BC%9A81%26sup3%3B%E4%B8%8E274%EF%BC%883%EF%BC%89%E8%AE%A1%E7%AE%97%EF%BC%9B%EF%BC%882a%26su)
(1)【(x²)²】²
=(x^4)²
=x^8
(2)比较大小:81³与27^4
因为81^3=(3^4)^3=3^12
27^4=(3^3)^4=3^12
所以81³=27^4
3)(2a³b^4)²
=4a^6 b^8
=(x^4)²
=x^8
(2)比较大小:81³与27^4
因为81^3=(3^4)^3=3^12
27^4=(3^3)^4=3^12
所以81³=27^4
3)(2a³b^4)²
=4a^6 b^8
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