47-[(45x24-512x12):14]
120:2+45x24-46=?
nhanh lên m.n ơi
120 : 2 + 45 x 24 - 46
= 60 + 1080 - 46
= 1140 - 46
= 1094
47-[(45.2 mũ 4-5 mũ 2 .12):14]
=47-[(45.16-25.12):14]
=47-[(720-300):14]
=47-[400:14]
=47-30
=17
a, 47 -[( 45.2 mũ 4- 5 mũ 2.12):14]
=47-[(45.16-25.12) :14]
=47-[(720 -300):14]
=47-[ 420:14]
=47-30= 17
Xong rồi nè! Chúc bạn thi tốt nha....!
T= -14 . 47 + 14 . (-52) + (-14)
T= -14 . 47 + 14 . (-52) + (-14)
T= -14 . 47 + (-14) . 52 + (-14) . 1
T= (-14) . (47+52+1)
T= (-14) . 100
T= -1400
Tick cho mình nha
tính hợp lí
a) 31/47 .14/29 +31/47 .15/29 + 16/47
\(\frac{31}{47}.\frac{14}{29}+\frac{31}{47}.\frac{15}{29}+\frac{16}{47}=\frac{31}{47}(\frac{14}{29}+\frac{15}{29})+\frac{16}{47}=\frac{31}{47}+\frac{16}{47}\)
=1
(36-16).(-15)+16.(-14-6) (-47).(-69)-(-31).47 38.(-41)+59.(-38)
a: \(\left(36-16\right)\cdot\left(-15\right)+16\cdot\left(-14-6\right)\)
\(=-15\cdot20+16\cdot\left(-20\right)=-20\cdot\left(-15+16\right)=-20\)
b: \(\left(-47\right)\cdot\left(-69\right)-\left(-31\right)\cdot47\)
\(=47\cdot69+31\cdot47\)
\(=47\cdot100=4700\)
c: \(38\cdot\left(-41\right)+59\cdot\left(-38\right)\)
\(=38\left(-41-59\right)\)
\(=-100\cdot38=-3800\)
\(x=\sqrt[3]{14-2\sqrt{47}}+\sqrt[3]{14-2\sqrt{47}}\)
tìm \(f\left(x\right)=x^3-6x\)
1.\(x=\sqrt[3]{14+2\sqrt{47}}+\sqrt[3]{14-2\sqrt{47}}\)
Tính \(f\left(x\right)=x^3-6x\)
đặt \(\sqrt[3]{14+2\sqrt{47}}=a\) , \(\sqrt[3]{14-2\sqrt{47}}=b\) rồi làm bt
a) 47 – [(45.24 – 52.12):14]
47 – [(45.24 – 52.12):14]
= 47 -[45.16 - 25.12):14]
= 47 - [720 - 300):14]
= 47 - [420:14]
= 47 - 30
= 17
47 - ( 45 . 24 - 52 . 12 ) :14
47 - ( 45 . 24 - 52 . 12 ) :14
= 47 - ( 45 . 16 - 25 . 12 ) :14
= 47 - ( 720 - 300 ) :14
= 47 - 420 : 14
= 47 - 30
= 17
-x +23 = 14 - 47
-x+23=14-47
-x+23=-33
-x=-33-23
-x=-56
k nhe dung lun
-x+23=14-47
=> -x+23= -33
=> -x= -33-23
=> -x= -56
=>x= 56
-x + 23 = 14 - 47
-x + 23 = -33
x + 23 = 33
x = 33 -23
=> x = 10