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Anonymous users2024-02-061*2+2*3+3*4。。。n(n+1)
1/3*[n(n+1)(n+2)]
Look at how many terms are before the equal sign, and after the equal sign is the product of three consecutive natural numbers that start with a third.
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Anonymous users2024-02-05Select D and set the total number of questions to x
Xiao Ming answered the question correctly 3x 4, Xiao Qiang answered the question correctly 27, both of them answered the question correctly 2x 3, there is a question to know that Xiao Ming and Xiao Qiang answered the question correctly are integers, so 3x 4, 2x 3 are integers, that is, the least common multiple is 12, 24, 36, 48....The meaning of the question can be 2x 3 should be 27, the solution is x 40, and Xiao Ming's correct answer must be greater than or equal to 27, so x takes 36, Xiao Ming answers 27 correctly, both of them answer correctly for 24, and the number of both people who do not answer correctly is 36-(27+27-24)=6
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Anonymous users2024-02-04It's very simple, set the small phoenix cake x yuan, then the egg roll is (yuan.
From the meaning of the title: 3x+3(
6x+x= meta-rule.
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Anonymous users2024-02-03Meta)...Price.
Meta)...The price of 1 box of small phoenix cakes and egg rolls is 3Meta)...Small phoenix cake.
Meta)...Egg roll.
Answer: 1 box of small phoenix cake yuan, 1 box of egg roll yuan.
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Anonymous users2024-02-02Let the egg roll be xyuan, and solve x=
So point to the roll yuan, the small phoenix cake yuan.
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Anonymous users2024-02-01I won't solve the equation, I bought a total of 6 boxes of food here, spent yuan, the average yuan, the difference is yuan, the egg roll is less than the average, and the same way Xiaofeng cake is more than average, so the egg roll yuan, Xiaofeng cake yuan.
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Anonymous users2024-01-31Set the egg roll for x yuan per box, and the small phoenix cake for each box x+
3x+3*（x+
Solution: 3x+3x+
Detain: x = so the egg roll is yuan per box, then the small phoenix cake is yuan per box.
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Anonymous users2024-01-30Let the egg roll be x, then the small phoenix cake is x+, and the column equation is.
3*(x+x+solutionx=.)
Therefore, each box of egg rolls and each box of small phoenix cakes are.
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Anonymous users2024-01-29Yuan divided by 3 = Yuan.
Divide by 2 = yuan.
Divide by 2 = Yuan Yuan Yuan.
Egg yuan, small yuan.
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Anonymous users2024-01-282.-19 4.-5 6.-64/27 7.-64/27 9.I don't understand.
10 to the 6th power, 11th to the power, 7th to the 7th power.
The original question is, if yes, yes, 566
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