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\(180:\left\{300:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(4.125-4.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(500-100\right)\right]\right\}\\ =180:\left\{300:\left[450-400\right]\right\}\\ =180:\left\{300:50\right\}\\ =180:6\\ =30\)
\(180:\left\{300:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(4.125-4.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(4.100\right)\right]\right\}\\ =180:\left\{300:\left[450-400\right]\right\}\\ =180:\left\{300:50\right\}\\ =180:6\\ =30\)
180 : { 300 : [ 450 - ( 4 . 53 - 22 . 25 )]}
= 180 : { 300 : [ 450 - ( 4 . 125 - 4 . 25 )]}
= 180 : { 300 : [ 450 - ( 500 - 100 )]}
= 180 : { 300 : 50 }
= 180 : 6
= 30
180: ( 300: ( 450 - (4 x 53 - 22x 25)))
=180: ( 300: ( 450 - ( 500 - 100 )))
=180: ( 300: ( 450 - 400 ))
=180: ( 300: 50)
=180: 6 = 30\(a,3^3+3^2-\left(2^7:2^5+7^8:7^7\right)=27+9-\left(2^2+7\right)=36-11=25\)
\(b,27.77+27.27-27=27\left(77+27-1\right)=27.103=2781\)
\(c,52:\left(43-30\right)+144-16=52:13+128=4+128=132\)
\(f,3^2.101-3^2.101^0=3^2\left(101-101^0\right)=9\left(101-1\right)=9.100=900\)
\(a,245-96+6\)
\(=155\)
\(b,=23\times\left(65+35\right)\)- 360
\(=23\times100-360\)
\(=1940\)
\(c,3^3+3^2-\left(2^2+7\right)\)
\(3^3+3^2-\left(4+7\right)\)
=\(3^3+3^2-11\)
=\(27+9-11\)
bai nay de thui
nhung bay gio mk phai di hoc rui
luc nao ve mk lam cho
k mk nha
\(\frac{450}{2^X-19}=180\)
\(2^X-19=\frac{450}{180}\)
\(2^X-19=2,5\)
\(2^X=19+2,5\)
\(2^X=21,5\)
Ta có:
180 = 22.32.5
2000 = 24.53
450 = 2.32.52
2020 = 22.5.101
Do đó số ước của 180; 2000; 450; 2020 lần lượt là:
(2 + 1)(2 + 1)(1 + 1) = 18 (ước)
(4 + 1)(3 + 1) = 20 (ước)
(1 + 1)(2 + 1)(2 + 1) = 18 (ước)
(2 + 1)(1 + 1)(1 + 1) = 12 (ước)
\(5^{300}và3^{450}\\ 5^{300}=15^{327}\\ 3^{450}=15^{445}\)
Vì \(15^{327}< 15^{445}\\ \Rightarrow5^{300}< 3^{450}.\)
\(a,2^{300}=\left(2^3\right)^{100}=8^{100}\)
\(3^{200}=\left(3^2\right)^{100}=9^{100}\)
Vì \(8^{100}< 9^{100}\) nên \(2^{300}< 3^{200}\)
\(b,8^5=32768\)
\(6^6=46656\)
Vì \(32768< 46656\) nên \(8^5< 6^6\)
\(c,3^{450}=\left(3^3\right)^{150}=27^{150}\)
\(5^{300}=\left(5^2\right)^{150}=25^{150}\)
Vì \(27^{150}>25^{150}\) nên \(3^{450}>5^{300}\)
#Ayumu