2 phần 3 - 1 phần 4+ 5 phần 11

5 phần 12+ 1- 7 phần 11. tính nhanh

TINH NHANH

2/3-1/4+5/11/5/12+1-7/11

TINH NHANH

2/3-1/4+5/11

5/12+1-7/11

\(\dfrac{\dfrac{2}{3}-\dfrac{1}{4}+\dfrac{5}{11}}{\dfrac{5}{12}+1-\dfrac{7}{11}}\) tinh nhanh

tinh nhanh\(P=\frac{\frac{2}{3}-\frac{1}{4}+\frac{5}{11}}{\frac{5}{12}+1+\frac{7}{11}}\)

a)11/53+(32/47+-10/53)+-64/94+1/53+1/3

b) (-1+45/115+47/51)+(-9/23+-1/3)

c) -13/49+12/48+1/12+3/18

d) 13/15+(-4/5+7/18)+-5/12+1/16

Cho P(x)=x^5+ax^4+bx^3+cx^2+dx+f.biet P(1)=5;P(2)=7;P(3)=9;P(4)=11.Tinh P(10),P(11),P(12),P(13)

tinh nhanh

a,A=100+98+96+...+2-97-95-...-1

b,B=1+2-3-4+5+6-7-8+9+10-11-12+...-229-330+301+302

c,C=41*66+34*41/3+7+11+...+79

d,D=1+2+3+...+200/6+8+10+...+34

e,E=1*5*6+2*10*12+20*24*4+9*45*54/1*3*5+2*6*10+4*12*20+9*27*45

Tinh nhanh  \(P=\frac{\frac{2}{3}-\frac{1}{4}+\frac{5}{11}}{\frac{5}{12}+1-\frac{7}{11}}\)