Ask for a question, a few questions, ask for help

The landlord said don't talk at length, there are so many words upstairs, and you should care more about the beauty around you, such as a group of ants dragging the corpse of an insect back to the nest, which reflects the unity between animals, isn't this a kind of beauty?

The opposite always goes with it.

If there is a question, there must be an answer, this is 1

A little deeper, Tai Chi Yin and Yang Fish Figure.

Simple 1 point, you touch all 1 cuts, each person, each animal.

Every tree, every grass, of course, includes yourself, and is a "great self."

However, the harmonious beauty embodied in the overall existence between things", just imagine.

If it weren't for the miracle of nature, you would have grown from a small fertilized egg to such a large number of hands and feet with precise symmetry.

ears and so on, and has so far the artificial power of the entire earth can not be simulated.

The ability to think and the ability to ask questions.

Even 1 drop of water and 1 grain of sand also contains no less than the mystery of the entire universe.

Secret, the so-called '1 flower 1 world, 1 sand 1 Bodhi', is just that you are to yourself.

There is no real understanding and knowledge of the Tao itself.

Get to know yourself', there are all sorts of labels and symbols outside of that.

Originally'You'.

Taiji gives birth to two rituals, two rituals give birth to four elephants, four elephants give birth to gossip, and gossip gives birth to all things !!Metal, wood, water, fire, and earth are mutually reinforcing!

<>ch：cf=1：3，∴ch：

FH: 1:2 , S FGH=2S CGH=2 24=48, S CFG=24+48=72, S Square=72 2=144, CG= 144=12

ab:BG=ch:CG=CH:CF=1:3, x:(x+12)=1:Yanhu3, ab=x=6.

Therefore, the side length of the square is equal to 6.

Because CGEF is a square.

So Chang Lao CF=CG, so CH=CG1 3 The area of the triangle CHG=CH*CG2=24

That is, leakage resistance: CH*3CH=48, CH=4, CG=12, because the triangle ABG and the triangle HCG are similar.

So ch:ab=cg:bg

4/ab=12/（12+ab）

12ab=4（12+ab）

ab=6 append:

f'(cosx+x2)(-sinx+2x) 2x (-sinx+2x) bent locust 2x -> ascend hand 1 bury friend 2 so 4*1 2=2 look.

1/k=(a+b)/c=(b+c)/a=(a+c)/b

1+1/k=1+(a+b)/c=1+(b+c)/a=1+(a+c)/b

1+k)/k=(a+b+c)/c=(a+b+c)/a=(a+b+c)/b

Because a, b, and c are all real numbers, and abc is not equal to 0

So, a+b+c=0, or, a=b=c

a+b+c=0, 1+k) k=(a+b+c) c=(a+b+c) a=(a+b+c) b=0

1+k=0k=-1

a=b=c.

1+k)/k=(a+b+c)/c=(a+b+c)/a=(a+b+c)/b=3

1+k=3k

k=1 2So, k=-1, or, k=1 2

2.Let a fountain pen be a dollar and a diary be a dollar b.

then 60 (a+2b) = 50 (a+3b).

a=3b, so the total price is 60(a+2b)=60(3b+2b)=300b

Therefore, you can buy a fountain pen for 300b a = 300b 3b = 100 pcs.

The diary that can be purchased is 300b b = 300 copies.

1。It is obtained by k=c a+b, c=k(a+b).

Substituting a b + c = b c + a to obtain (k+1)a 2=(k+1)b 2

So, (1) when k = -1 is constant, 2) when k ≠-1, a 2 = b 2

In the same way, we get c 2 = b 2

So a 2 = b 2 = c 2

If all three are positive real numbers, then k=1 2

are negative real numbers, then k = 1 2

Therefore k = 1 2 or -1

Note: It is impossible to alternate between positive and negative, think about why) In addition, it can also be solved by the law of proportionality.

Needless to say, question 2 will not be mentioned.

There is a lazy way to solve the first problem, so that a=b=c can satisfy the equation, but if, when a=b=c=1, k=2, a=b=c=2, k=3, then there is a problem with your problem.

The second question can be seen from the meaning of the question: 60a+120b=90a+30b, and a=3b

Then you have to buy a fountain pen for 60 + 120 3 = 100

The all-buy notebook is 60*3+120=300

Ask if k=c a+b is the same as k=c (a+b).

There is an error in question 1. 2 questions, from the meaning of the question, you can know that the mu is noisy.

60a+120b=90a+30b.

a=3b.

If you buy a fountain pen in full, you can buy 60 + 120 3 = 100

Buy all notebooks and can buy 60 * 3 + 120 = 300

Solution: Let the profit margin of steel ** rise before x%. Think of the cost of steel before it rises as "1".

1+x%)(1+5%)-1+10%)=x%·(1-20%)x=20

Steel** had a profit margin of 20% before it rose.