Ta có :
\(5^{2017}:\left(5^{2015}.16+5^{2015}.9\right)\)\(=5^{2017}:\left[5^{2015}\left(16+9\right)\right]\)
\(=5^{2017}:\left[5^{2015}.5^2\right]=1\)
2/ \(4.\left(2017-16x\right)=10^2-2^5\)
\(\Rightarrow4.2017-4.4^2x=100-25\)
\(\Rightarrow8068-4^3.x=75\)
\(\Rightarrow64x=8068-75\)
\(\Rightarrow64x=7993\)
\(\Rightarrow x=\frac{7993}{64}\)
thuc hien phep tinh
a. 2 nhan 7 mu 2 - 16 nhan 2 mu 3
b. 17 nhan 120 + 17 nhan ( -20 )
tim so tu nhien x , biet:
4 nhan ( 2017- 16 x )=102- 25
tim x, biet
a. x + 7 = 15
b. 3 nhan - 14 = 16
Tim x ,biet :100:2 nhan {x+1]=25
khi thuc hien mot phep nhan so tu nhien voi 2009 ban ha so y quen viet 2 chu so 0 cua so 2009 nen tich giam 346500 don vi tim tich dung
Thuc hien cac phep tinh (tinh nhanh neu co the) a> (24 - 36)+112 b>16 nhan 20 -8 nhan 10 nhan 2 c.2 nhan (3)mu 2 +3 nhan (+5)+15
Tim x: 3.2^x+2^x=16
(3x-2)^2+1/4=1/2
Thuc hien phep tinh: 5.(-0,2)^2+3/8.(9/2-2,5)^2-(-1/5)
Mn giup mk nha
Please
tim x thuoc N:
a) 2 mu x =4 nhan 128
b)2 mu x nhan 3 mu x =4 nhan 9
tim x thuoc n biet : b,(149 nhan 35 : x + 5) nhan 17 =13 va d/(3 nhan x tru 3 ) binh phuong 3 =2 nhan 32 e/5 x+1-5x=500
