Toán Lớp 6: 1, rút gọn
a, A= 4^6 x 9^5+ 6^9 x 120 / 8^4 x 3^12
b,B= 5.4^15.9^9-4.3^26.8^9 / 7. 2^29 .27^6 -5. 2^29 . 9^16
c,C= 5^10 .7^3 -25^3.49^2 / ( 125.7)^3+ 5^9 .14^2
trên mạng cx có bài gần giống như này mà khác nha các bạn đừng lấy trên đấy nha mik cảm ơn
Leave a reply
Comments ( 2 )
A=(4^6*9^5)/(8^4*3^12)+(6^9*120)/(8^4*3^12)
A=(2^12*3^12)/(2^12*3^12)+(2^9*3^9*2^3*3*5)/(2^12*3^12)
A=1+(2^12*3^10*5)/(2^12*3^10*3^2)
A=1+5/3^2
A=1+5/9
A=9/9+5/9
A=14/9
___________________________-
b,B= (5. 4^15. 9^9- 4.3^26. 8^9) / (7. 2^29 .27^6 -5. 2^29 . 9^16)
B=(5*2^30*3^18-2^2*3^26*2^27)/(7*2^29*3^18-5.2^29*3^32)
B=(5*2^30*3^18-3^26*2^29)/(7*2^29*3^18-5.2^29*3^32)
B=(3^18(5*2^30-3^8*2^29))/(3^18(7*2^29-5*2^29*3^14))
B=(5*2^30-3^8*2^29)/(7*2^29-5*2^29*3^14)
B=(2^29(5*2-3^8))/(2^29(7-5*3^14))
B=(5*2-3^8)/(7-5*3^14)
B=(10-6561)/(7-5*4782969)
B=(10-6561)/(7-23913480)
B=-6551/-239134873
_____________
c)C= (5^10 .7^3 -25^3. 49^2) / (( 125.7)^3+ 5^9 .14^2)
C= (5^10 .7^3 -5^6. 7^4) / ( 125^3*7^3+ 5^9 .2^2*7^2)
C= (5^10 .7^3 -5^6. 7^4) / ( 5^9*7^3+ 5^9 .2^2*7^2)
C= (5^6(5^4 .7^3 – 7^4)) / ( 5^6(5^3*7^3+ 2^2*7^2)
C= (5^4 .7^3 – 7^4) / (5^3*7^3+ 2^2*7^2)
C= (7^2(5^4*7 – 7^2)) / (7^2(5^3*7+ 2^2)
C= (5^4*7 – 7^2) / (5^3*7+ 2^2)
C=(625*7-49)/(125*7+4)
C=(4375-49)/(875+4)
C=4329/879
C=1443/293
A=(4^6*9^5)/(8^4*3^12)+(6^9*120)/(8^4*3^12)
A=(2^12*3^12)/(2^12*3^12)+(2^9*3^9*2^3*3*5)/(2^12*3^12)
A=1+(2^12*3^10*5)/(2^12*3^10*3^2)
A=1+5/3^2
A=1+5/9
A=9/9+5/9
A=14/9
___________________________-
b,B= (5. 4^15. 9^9- 4.3^26. 8^9) / (7. 2^29 .27^6 -5. 2^29 . 9^16)
B=(5*2^30*3^18-2^2*3^26*2^27)/(7*2^29*3^18-5.2^29*3^32)
B=(5*2^30*3^18-3^26*2^29)/(7*2^29*3^18-5.2^29*3^32)
B=(3^18(5*2^30-3^8*2^29))/(3^18(7*2^29-5*2^29*3^14))
B=(5*2^30-3^8*2^29)/(7*2^29-5*2^29*3^14)
B=(2^29(5*2-3^8))/(2^29(7-5*3^14))
B=(5*2-3^8)/(7-5*3^14)
B=(10-6561)/(7-5*4782969)
B=(10-6561)/(7-23913480)
B=-6551/-239134873
_____________
c)C= (5^10 .7^3 -25^3. 49^2) / (( 125.7)^3+ 5^9 .14^2)
C= (5^10 .7^3 -5^6. 7^4) / ( 125^3*7^3+ 5^9 .2^2*7^2)
C= (5^10 .7^3 -5^6. 7^4) / ( 5^9*7^3+ 5^9 .2^2*7^2)
C= (5^6(5^4 .7^3 – 7^4)) / ( 5^6(5^3*7^3+ 2^2*7^2)
C= (5^4 .7^3 – 7^4) / (5^3*7^3+ 2^2*7^2)
C= (7^2(5^4*7 – 7^2)) / (7^2(5^3*7+ 2^2)
C= (5^4*7 – 7^2) / (5^3*7+ 2^2)
C=(625*7-49)/(125*7+4)
C=(4375-49)/(875+4)
C=4329/879
C=1443/293