A 1, n/m 2, (b/(a-x)-b/a) 3,6.63 *10-34 to the power of 4,0.00004.

2 1, 1 2, 100 3, 1/25 4, 100

Three 1, 10 to the fifth power of 2. 10 to the fifth power 3,-1. 12* 10 to the fifth power 4,-1. 12* 10 to the fourth power.

4. Items 2, 4, 5 and 7 belong to one category, and the rest belong to one category.

Five 1, (1-X) 2, the square of c 3, 2a +a- 14 4, 6x +3x-6.

Six 1, b/2a 2, -x/3z 3, 1/2x 4, (x-y)/(x+y)

Seven 1, b/abx a/abx 2, by/(ay-xy) c/(ay-xy) 3,2 (x+2)/(x+1) (x+2) 4, (2x-5)/(4x

8 pieces 1, x/x-y 2, 4/9 squared 3(xy), (2b-2a)/a 4, (8-5a)/(a- 1) (2-a)

Nine 1, x = 2 2, x = 5 3, x=3.

Ten (1/n) (a1+a2+a3+...+an)

Solution 1 1: If car B travels x kilometers per hour, car A travels (x+ 10) kilometers per hour.

450/(X+ 10)=400/X

400X+4000=450X

4000 = 50 times

X=80 X+ 10=90

Twelve solutions: suppose the manual translates x words per minute, then the receiver translates 75X words per minute.

3000/X-3000/75X= 148

3000/X-40/X= 148

3000-40= 148X

X=20 75X= 1500

Thirteen 1, the square of b /(a-b) 2, (x-1)/(x+1) 3,2b/(a-b) 4,2/y.

XIV 1/u+ 1/v = 1/f

1/24+ 1/8= 1/f

1/24+3/24= 1/f

1/6= 1/f

f=6

XV P 1/V2=P2/V 1

P 1*V 1=P2*V2

1.0 1 * 100000 * 2 = 3.03 * 100000 * V2

2.02=3.03*V2

2=3*V2

V2=2/3

Sixteen 1, the square of A+1/a = the square of (a+1/a)-2 =2.

2, the square of A+1/a = the square of a-1/a +2=4.25.

Seventeen 1 is -2x times the previous formula.

2, -5 12*x to the power of 10

Give it to me! ! ! ! ! If you don't give it to me, I won't scold you, really, absolutely! ! ! ! )

88 888 8888 Goodbye