Expand(1-2x)^4(1+3x)^3 in ascending powers of x as far as the term in x^2
如果我在expand 的時候，有加到last term 的話，會考會否被扣分？
即是：(1+2x)^4(1+3x)^3
＝(1+8x+24x^2+...+(2x)^4)(1+9x+27x^2+...+(3x)^3)
=1+9x+27x^2+8x+72x^2+24x^2+...+(2x)^4(3x)^3
=1+17x+123x^2+...+(2x)^4(3x)^3
a.math~binomial theorem
2008-03-22 2:14 am
回答 (2)
2008-03-22 3:05 am
✔ 最佳答案
當然唔會俾扣分!!![不過其實有d情況係唔需要理會最尾個項,所以唔寫好過寫,同埋避免寫錯野]但假若你係忘記加「...」就一定會被扣分!!!
2008-03-21 19:18:42 補充：
下邊個位唔知你有冇考過amaths??我想問下點解寫埋最尾個項就要扣分??唔該你睇下marking scheme有冇話扣分,唔好亂答!!
2008-03-22 3:07 am
唔使加last term……有機會俾人扣分…因為題目只你叫你expand 到x^2……要跟番題目指示做先得架嘛…=]
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