Tách hai dấu ngoặc thành hai vế A và B
Ta có :
A=5.415.99-4.320.89=5.230.318-22.227.320
=229.318(2.5-32)=229.318
B=5.29.619-7.229.276=5.29.219.319-7.229.318
=228.318(5.3-7.2)=228.318
=>A:B=229.318:228:318=2
thuc hien phep tinh
\(\frac{5\cdot4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)
minh can cach lam
ai nhanh minh tk
cho
a,A=5*4^15*9^9-4*3^20*8^9và B=5*2^9*6^19-7*2^29*27^6 tinh a/b
b,C=5*4^15*9^9-4*3^20*8^9/5*2^9*6^19-7*2^29*27^6
b,C=5*4^15*9^9-4*3^20*8^9/5*2^9*6^19-7*2^29*27^6
(5*4^15*9^9-4*3^20*8^9) : (5*2^9*6^19-7*2^29*27^6)
1) Thuc hien phep tinh:
a) 4^6 × 9^2 / 6^3 × 8^2
b) 5^6 × 15^4 /5^4 × 3^3
c) 3^9 - 2^3 × 3^7 + 2^10 × 3^2 - 2^13 / 3^10 - 2^2 × 3^7 + 2^10 × 3^3 - 2^12
d) (1/9)^10 : (1/3)^20
e) (1/64)^5 × (1/4)^7
2) Chung minh rang:
a)2014^100+2014^99 chia het cho 2015
b) 4^13+32^5-8^8 chia het cho 5
c) 81^27-27^9-9^13 chia het cho 405
Help me!! Pleass!!
Câu 2:
a,-2/49-(5/3-2/49) b,C=5*4^15*9^9-4*3^20*8^9/5*2^9*6^19-7*2^29*27^6
Câu 2:
a,-2/49-(5/3-2/49) b,C=5*4^15*9^9-4*3^20*8^9/5*2^9*6^19-7*2^29*27^6
tính giá tại biểu thức sau: B=(5*4^15*9^9-4*3^20*8^9):(5*2^9*6^19-7*2^29*27^6)
