\(=6^6\left(1+5\cdot6\right)=6^6\cdot31\)
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tính giá trị
a,\(\dfrac{\left(-3\right)^7.2^8}{6^7}\)
b,\(\dfrac{-3.7^4+7^3}{7^5.6-7^3.2}\)
c,\(\dfrac{5^3.3^5}{5^3.0.5+125.2.5}\)
4^5+4^5+4^5+4^5/3^5+3^5+3^5.6^5+6^5+6^5+6^5+6^5+6^5/2^5+2^5=8^x Tìm x
a)tìm x,y biết:x-1/y+2 và x+y=23
b)tìm x biết: 4^5+4^5+4^5+4^5/3^5+3^5+3^5.6^5+6^5+6^5+6^5+6^5+6^5/2^5+2^5=8^2x-6
1+23++31++123+12+4+15+5+7+624+++857+8+854++5+4+2+4+6+4+++54+63542+513++8524+5+6+4+6+45+6+4++532+7+9863+4+6+37+++5463+45++6324+3+1++3+23+4+5+34+5+45++45+54+45++35+45+
Cho A= 1/1.2+1/2.3+1/5.6+....+1/99.100
CMR 7/12<A<5/6
CMR 7/12<1/1.2+1/3.4+1/5.6+...+1/99.100<5/6
Tìm x
a, x+1/9-3/5=3/6
b, 3/4-x+6/-11=5/6
C, X/4-3/7+2/5=31/140
D, 5/12+5/X-1/8=1/2
Chứng minh 7/12< 1/1.2 + 1/3.4 +1/5.6 +...... + 1/99.100 <5/6
Cho A=1/1.2+1/3.4+1/5.6+...+1/99.100,CMR:7/12<A<5/6