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Anonymous users2024-02-05The best way to solve the first problem is to give an example:
It is nothing more than two situations, one is that the price has risen, so for example, the first time is 1 yuan, the second time is 2 yuan, Xiao Ning buys 10 copies each time, and Xiaoyun uses 10 yuan each time. So in the end, Xiao Ning bought 20 copies for 30 yuan, and Xiao Yun lost 15 copies for 20 yuan, with an average of ** Xiao Ning Yuan, Xiao Yun Yuan.
The second is that the price has been reduced, so for example, the first time is 1 yuan, the second time is yuan, Xiao Ning buys 10 copies each time, and Xiaoyun uses 10 yuan each time. So in the end, Xiao Ning bought 20 copies for 15 yuan, and Xiao Yun lost 30 copies for 20 yuan, with an average of ** Xiao Ning Yuan, Xiao Yun Yuan.
So no matter what, Xiaoyun saves money.
It's easy enough!!
The second question is that you can follow my method as an example, and I won't be verbose. If you don't understand, let's talk about it, hehe.
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Anonymous users2024-02-04The first question should be discussed in a categorical manner, and the second question is just a special case of the first question! I think you can make it. Actually, I won't!!
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Anonymous users2024-02-03First of all, because (A+B) 2 (forgiveness) >0, A 2+B 2>2AB sets Xiaoning to buy x copies every time and Xiaoyun to buy Y copies every time.
Then the unit price of Xiaoning: (ax+bx) 2x, that is, (a+b) 2 2(a+b) Xiaoyun unit price: y (y a+y b), that is, the denominator of 4AB 2(A+B) is a 2+b 2-2AB>0
So Xiaoyun is cheaper.
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Anonymous users2024-02-02If bp and cp are bisectors of b and c respectively, find the degree of p.
p=122° or 58° because it's not clear which angle your p is.
Analysis: BP and CP are bisectors of B and C respectively, then PBC+ PCB=1 2(ABC+ ACB)=1 2(180°- A)=58° BPC=180°-58°=122°
If one of BP and CP is the bisector of the inner angle and the other is the bisector of the outer angle, find the degree of p.
p=32° Your drawing is a bit problematic Suppose bp is the bisector of the inner angle of b, and cp is the bisector of the outer angle of c, extending bc to d, then there is abc a acd (the outer angle of c), and the two formulas of 1 2( abc p 1 2( acd) pcd can be solved immediately to obtain p=32°
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Anonymous users2024-02-01All I can say is that you didn't make your question clear! P is that horn? Let's make it clear!
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