若(x方+px+8)(x方-3x+q)的乘积中不含x方项和x的立方项,则p,q的值是
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![若(x方+px+8)(x方-3x+q)的乘积中不含x方项和x的立方项,则p,q的值是](/uploads/image/z/7818458-50-8.jpg?t=%E8%8B%A5%EF%BC%88x%E6%96%B9%2Bpx%2B8%29%28x%E6%96%B9-3x%2Bq%29%E7%9A%84%E4%B9%98%E7%A7%AF%E4%B8%AD%E4%B8%8D%E5%90%ABx%E6%96%B9%E9%A1%B9%E5%92%8Cx%E7%9A%84%E7%AB%8B%E6%96%B9%E9%A1%B9%2C%E5%88%99p%2Cq%E7%9A%84%E5%80%BC%E6%98%AF)
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若(x方+px+8)(x方-3x+q)的乘积中不含x方项和x的立方项,则p,q的值是
若(x方+px+8)(x方-3x+q)的乘积中不含x方项和x的立方项,则p,q的值是
若(x方+px+8)(x方-3x+q)的乘积中不含x方项和x的立方项,则p,q的值是
(x方+px+8)(x方-3x+q)
=x^4+(p-3)x³+(q-3p+8)x²+(pq-24)x+8q
不含x方项和x的立方项则这两项系数为0
所以p-3=0,q-3p+8=0
所以p=3
q=3p-8=1
P=3,Q=1