计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程 计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程填空题:1+20a²+( )=(1-5a)²若3^m=5,9^n=10,则3^m+2n的值是?使分式17\x+2=17x\x²
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![计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程 计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程填空题:1+20a²+( )=(1-5a)²若3^m=5,9^n=10,则3^m+2n的值是?使分式17\x+2=17x\x²](/uploads/image/z/9492580-28-0.jpg?t=%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%9A%EF%BC%88-2%5C3ax%26%23179%3B%EF%BC%89%26%23178%3B%2B3ax%5E4%EF%BC%881-1%5C3ax%26%23178%3B%EF%BC%89%E8%A6%81%E8%BF%87%E7%A8%8B+%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%9A%EF%BC%88-2%5C3ax%26%23179%3B%EF%BC%89%26%23178%3B%2B3ax%5E4%EF%BC%881-1%5C3ax%26%23178%3B%EF%BC%89%E8%A6%81%E8%BF%87%E7%A8%8B%E5%A1%AB%E7%A9%BA%E9%A2%98%EF%BC%9A1%2B20a%26%23178%3B%2B%EF%BC%88+%EF%BC%89%3D%EF%BC%881-5a%EF%BC%89%26%23178%3B%E8%8B%A53%5Em%3D5%2C9%5En%3D10%2C%E5%88%993%5Em%2B2n%E7%9A%84%E5%80%BC%E6%98%AF%3F%E4%BD%BF%E5%88%86%E5%BC%8F17%5Cx%2B2%3D17x%5Cx%26%23178)
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计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程 计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程填空题:1+20a²+( )=(1-5a)²若3^m=5,9^n=10,则3^m+2n的值是?使分式17\x+2=17x\x²
计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程
计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程
填空题:1+20a²+( )=(1-5a)²
若3^m=5,9^n=10,则3^m+2n的值是?
使分式17\x+2=17x\x²+2x自左至右变形成立的条件是?
计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程 计算题:(-2\3ax³)²+3ax^4(1-1\3ax²)要过程填空题:1+20a²+( )=(1-5a)²若3^m=5,9^n=10,则3^m+2n的值是?使分式17\x+2=17x\x²
解
原式
=4/9a²x^6+3ax^4-a²x^6
=-5/9a²x^6+3ax^4
1+20a²+()
=(1-5a)²
=1-10a+25a²
∴()=-10a+5a²
3^m=5
9^n=10即3^2n=10
∴3^(m+2n)
=3^m×3^2n
=5×10
=50
最后一道题不是很清楚,请重新说明