It is known that A and B are opposite numbers to each other, and C and D are reciprocal to each othe

Knowing that a and b are inverse numbers to each other, c and d are reciprocal to each other, and the absolute value of x is equal to 5, try to find the value of x + (a + b + cd) x + (a + b) 2007 (power of ) + cd) 2008 power of the law.

2007 and 2008 are the multiplier attention!

The solution consists of a and b being the opposite of each other, c and d being the reciprocal of each other, and the absolute value of x is equal to 5

A+B=0 C*D=1 x= 5

Substituting x + (a + b + cd) x + (a + b) 2007 (to the power of the cube) + cd) to the power of 2008.

Because (a+b)2007(power)=0, (cd)2008 power=1

So the original formula = 25 + (0 + 1) * (5) + 0 + 1

31 or 21 has 42 tons of goods, transported from city A to Bcheng, the load capacity of the large truck is 8 tons, the load of the passenger car is 4 tons, the fuel consumption of each full load of the two trucks is 10 liters and liters respectively, how many large and small trucks are used to transport these goods, the fuel consumption is the smallest, what is the minimum??

Solution: Because 42 8=5....Remainder 2 42 4 = 10....Remainder 2

To minimize fuel consumption, it is necessary to use large cars to pull as much as possible, so use large cars to pull 5 cars, and small cars to pull one car.

Fuel consumption = 5 * 10 + liters.

991 72 (-36) Simple arithmetic.

First, after the 72 and 36 divisions, 991 72 (-36) becomes -991 2=-[(900 2)+1 2]=-(450+

1.32 or 22

2.Large 5 Small 1 The minimum value is liters.

a+b=0，cd=1

x=-（a-2b）-3（1-a）=-a+2b-3+3a=2a+2b-3=2（a+b）-3=0-3=-3

y=c d+d - (ignition d c+c-1)=c+d -d c-c+1=d(d-1 c)+1=d(dc-1) c+1=0+1=1

So. 2x+y) 3-(3x-2y) 6=(-6+1) macro hand void 3-(-9-2) 6=-5 3+11 Tu Jing 6=1 6

If you fill in the blanks with a choice or a family agitator, you can just make a=1 b=-1 c=1 d=1 and then substitute the formula.

If you don't believe it, you can find a few more similar questions and try to do the math, which saves time and brainpower, and the accuracy is extremely high.

Because a+b=0,cd=1,simplification and change to x=(a+b)-3=-3,y=(c 2-c+1) c.So the result is that the bridge is destroyed (4c 2-7c+4) 6c

1 All a, b are inverses of each other, and c and d are reciprocal of each other, then, a=-b, cd=1

a+100a/b+(b/a)^2010-(cd)^2009=a+100(-1)+(1)2010-1^2009=a+100

Opposite to each other, the addition is equal to 0, the reciprocal is equal to each other, and the multiplication is equal to 1, so the original formula is equal to -1

From the question, we can see that a=-b, c=1|d, so a+b+0, cd=1, so the original formula is equal to -1

A and b are inverses to each other.

a+b =0,b=-a

c and d are mutually reversible.

c*d=1a²-b²/a²+b²-cd=a²-(a)²/a²+a²-1=2a²-2

Solution: A and b are opposite to each other, then a+b=0

c and d are the reciprocal of each other, then cd=1

x|=1, then x = 1, x = 1

So x - (a+b+cd)x-cd

1⑵ x²-（a+b+cd）x-cd

1 May it help you!

It is known that a and b are inverse numbers to each other, a+b=0

c,d are reciprocal to each other c*d=1x -(a+b+cd)x-cd

x²-x-1

x = 1 or -1

ab is the opposite of each other and yes, cd is the reciprocal product of 1, |x|=1 x=1 or x=-1

x - (a+b+cd)x-cd=1-(0+1)x-1=-x, so when x=1, the original formula =-1

When x=-1, the original formula = 1

Hope it helps.

A and b are inverses to each other, and c and d are reciprocals to each other.

a+b=0 c*d=1

3a+3b-21/6cd+3

3(a+b)-21/6cd+3

3a+3b-21/6cd+3

If a + b = 0, then a b has a value of 0 or -1 (ab is the opposite of each other, including 0).