2018-08-31 重点归纳
AMC12是针对高中学生的数学测验,该竞赛开始于2000年,分A赛和B赛,于每年的2月初和2月中举行,学生可任选参加一项即可。其主要目的在于激发学生对数学的兴趣,参予AMC12的学生应该不难发现测验的问题都很具挑战性,但测验的题型都不会超过学生的学习范围。这项测验希望每个考生能从竞赛中享受数学。那么接下来跟随小编来看一下AMC12的官方真题以及官方解答吧:
What is the value of ?
Factoring out from the numerator and cancelling out from the numerator and the denominator, we have
We can use subtraction of fractions to get
Factoring out gives .
For what value of does ?
We can rewrite as :Since the bases are equal, we can set the exponents equal, giving us . Solving the equation gives us
We can rewrite this expression as , which can be simplified to , and that can be further simplified to . This leads to . Solving this linear equation yields
以上就是小编对AMC12数学竞赛试题及答案的介绍,希望对你有所帮助,更多学习资料请持续关注AMC数学竞赛网!
下一篇: AMC考试都适合什么年龄段的学生参加?