giup minh gai bai nay voi nha
a, <x+y+z+>mu 2
b , <x+y-z-d>mu 2
giai giup minh bai toan nay voi : 2 .x -138= 2 mu 3 nhan 3 mu 2
X mu 10 = 1 mu x
Hay giup minh giai bai toan nay voi va hay giai thich nha
x10 = 1x
=> x10 = 1 (vì 1 mũ mấy cũng bằng 1)
=> x10 = 110
=> x = 1.
\(x^{10}=1^x\)
\(\Rightarrow x^{10}=1\)
\(\Rightarrow x^{10}=1^{10}\)
\(\Rightarrow x=1\)
2018(225-1 mu 2)*(225 -2 mu 2 ) *......*(225 -56 mu 2 ) Hay tinh nhanh , mk gui bai sai , llan nay dung de , cac ban giup nha
MN giup cho em bai nay voi a
de bai nhu sau:
1+2+4+6+...+2n(do mik nhac ghi so mu nen ghi the cho nhanh)
tim x de:H+1=2100
Em ghi lại đề đầy đủ, chính xác mới làm được!
cac ban oi giup minh voi
1.tim a,b thuoc Z,biet:a.(2b-3)=-6
2.cho x,y thuoc Z thoa man x mu 2 +y mu 2 chia het cho 3.chung to x va y chia het cho 3.
giup minh bai toan ne nhe
cau 1;
cho 3a+2b(a,bt thuoc tap hop so tu nhien ) cmr : 10a+b chia het cho 17
cau 2 ;
tim chu so tan cung cua 2 mu 1000 , 4 mu 161.
lam cu the cho minh nhe
Tinh tong sau hop li :
A=2+2 mu 2 + 2 mu 3 + ............+2 mu 100
B=1+3 mu 2 + 3 mu 3 + .......... + 3 mu 2009
C = 4+ 4 mu 2 + 4 mu 3 + ...............+ 4 mu n
Giup minh voi sory may minh ko co dau minh dang can gap lam !!!
Lần sau viết cái đề rõ rõ ra nhs!!!
a) \(A=2+2^2+2^3+................+2^{100}\)
\(\Rightarrow2A=2^2+2^3+2^4+................+2^{100}+2^{101}\)
\(\Rightarrow2A-A=\left(2^2+2^3+..............+2^{100}+2^{101}\right)-\left(2+2^2+............+2^{100}\right)\)
\(\Rightarrow A=2^{101}-2\)
b) \(B=1+3+3^2+..................+3^{2009}\)
\(\Rightarrow3B=3+3^2+3^3+..................+3^{2009}+3^{2010}\)
\(\Rightarrow3B-B=\left(3+3^2+...............+3^{2010}\right)-\left(1+3+3^2+.............+3^{2009}\right)\)
\(\Rightarrow2B=3^{2010}-1\)
\(\Rightarrow B=\dfrac{3^{2010}-1}{2}\)
c) \(C=4+4^2+4^3+................+4^n\)
\(\Rightarrow4C=4^2+4^3+.................+4^n+4^{n+1}\)
\(\Rightarrow4C-C=\left(4^2+4^3+.............+4^n+4^{n+1}\right)-\left(4+4^2+............+4^n\right)\)
\(\Rightarrow3C=4^{n+1}-4\)
\(\Rightarrow C=\dfrac{4^{n+1}-4}{3}\)
\(A=2+2^2+2^3+...+2^{100}\)
\(2A=2^2+2^3+2^4+...+2^{101}\)
\(\Rightarrow2A-A=2^{101}-2\)
\(\Rightarrow A=2^{101}-2\)
Vậy \(A=2^{101}-2\).
\(B=1+3^2+3^3+...+3^{2009}\)
\(3B=3+3^3+3^4+...+3^{2010}\)
\(\Rightarrow3B-B=3^{2010}-7\)
\(\Rightarrow2B=3^{2010}-7\)
\(\Rightarrow B=\dfrac{3^{2010}-7}{2}\)
Vậy \(B=\dfrac{3^{2010}-7}{2}\).
\(C=4+4^2+4^3+...+4^n\)
\(4C=4^2+4^3+4^4+...+4^{n+1}\)
\(\Rightarrow4C-C=4^{n+1}-4\)
\(\Rightarrow3C=4^{n+1}-4\)
\(\Rightarrow C=\dfrac{4^{n+1}-4}{3}\)
Vậy \(C=\dfrac{4^{n+1}-4}{3}\).
giup minh voi 2.3 mu x = 10.3 mu 12+ 8. 2 mu4
2.3x = 10.312 + 8.24
2.3x = 5 314 538
3x = 2 657 269
...
2 mu 8 nhan 2mu12
ket qua bang bao nhieu . ban nao giai nhanh bai nay ho minh voi !
\(2^8\cdot2^{12}=2^{8+12}=2^{20}=1048576\)
chuc bn hoc gioii!
nhae
$$
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