1.1+2-6=?
1.4.0.4+1.1+2.0 +2+5+8+3+6+9+1+4+7.1.2.4.7.56.9.0
=39
tính máy tính nha bạn chính xác 100 %
Tính :
\(\dfrac{5^2.6^1.1.(-16)^2+6^2.(-12)^6.(-15)^2}{2.(-6)^1.2.10^4-81^2.960^3}\)
\(\dfrac{5^2\cdot6\cdot\left(-16\right)^2+6^2\left(-12\right)^6\left(-15\right)^2}{2\left(-6\right)\cdot2\cdot10^4-81^2\cdot960^3}=\dfrac{3\cdot5^2\cdot2^9+2^{14}\cdot3^{10}\cdot5^2}{-2^7\cdot3\cdot5^4-2^{18}\cdot3^{11}\cdot5^3}=\dfrac{2^9\cdot3\cdot5^2\left(1+2^5\cdot3^9\right)}{-2^7\cdot3\cdot5^3\left(5+2^{11}\cdot3^{10}\right)}=-\dfrac{2^2\left(1+2^5\cdot3^9\right)}{5\left(5+2^{11}\cdot3^{10}\right)}\)
Đề tự chế???
\(\dfrac{5^2.6\left(-16\right)^2+6^2\left(-12\right)^6\left(-15^6\right)}{2\left(-6\right).2.10^4-81^2.960^3}=\dfrac{3.5^2.2^9+2^{18}.3^{11}.5^3}{-2^7.3.5^4-2^{18}.3^{11}.5^3}\)
=\(\dfrac{2^9.3.5^2\left(1+2^2.3^9\right)}{-2^7.3.5^3\left(5+2^{11}.3^{10}\right)}=\dfrac{2^2\left(1+2^5.3^9\right)}{-5\left(5+2^{11}.3^{10}\right)}\)
\(=\dfrac{4\left(1+1\right)}{-5\left(5+2^6.3\right)}=\dfrac{8}{-985}\)
Tính :
a. 2.3/5 : 2.1/4 + 5/2
b. 16/6 - 2.1/6 : 1.1/7
a.2.3/5:2.1/4+5/2
=2.3.4/5.2.1+5/2
=3.4/5+5.2
=12/5+5/2=24/10+25/10=49/10
b.16/6-2.1/6:1.1/7
=16/6-2/6.1/7
=16/6-2/42
=55/21
a)2×3/5÷2×1/4+5/2
=6/5÷1/2+5/2
=12/5+5/2
=49/10
b)16/6-2×1/6÷1×1/7
=8/3-1/3÷1/7
=8/3-7/3
=1/3
giúp mình các bạn ơi (1999x1998+1998x1997)x(1.1/2-1.1/2-1.1/3)
3x.(1/1.1/2+1/2.1/3+1/3.1/4+1/4.1/5+1/5.1/6)=3/4
thực hiện phép tính
(1+1/2)(1+1/3)(1.1/6)...(1+1/66)
-1.1(6) duoi dang phan so toi gian
a)E=1+3+6+...+5050
b)F=6+16+30+...+2040
c)G=2+5+9+...+10300;d)n!=1.2.3. ... .n-Rút gọn A=1.1!+2.2!+3.3!+....+n.n
Giải phương trình :
\(\frac{9x-0.7}{4}-\frac{5x-1.5}{7}=\frac{7x-1.1}{3}-\frac{2-10x}{6}\)