512:58
79:76
55x53
45x2
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\(125879-\left(x-2597\right)-5879=52369\)
\(125879-\left(x-2597\right)=52369+5879\)
\(125879-\left(x-2597\right)=58248\)
\(x-2597=125879-58248\)
\(x-2597=67631\)
\(x=65034\)
125879 - (x - 2597) - 5879 = 52369
120000 - (x - 2597) = 52369
x - 2597 = 120000 - 52369
x - 2597 = 67631
x = 67631 + 2597
x = 70228
125879 − (x − 2597) − 5879 =52369
125879−(�−2597)= 52369+ 5879125879 − (x − 2597) = 52369+ 5879
125879−(�−2597)= 58248125879 − (x − 2597) = 58248
�−2597= 125879− 58248 x − 2597= 125879− 58248
�−2597=67631 x − 2597=67631
�=67631+2597 x =67631+2597
�=70228 x =70228 Vậy x = 70228
❤ Nhớ k cho mk nha
# Chúc bạn học tốt❤
125879 - (\(x\) - 2597) - 5879 = 52369
125879 - \(x\) + 2597 - 5879 = 52369
(125879 - 5879) - \(x\) + 2597 = 52369
120 000 - \(x\) + 2597 = 52369
122597 - \(x\) = 52369
\(x\) = 122597 - 52369
\(x\) = 70228
Ta có:
\(P=512-\frac{512}{2}-\frac{512}{2^2}-\frac{512}{2^3}-...-\frac{512}{2^{10}}\)
\(\Rightarrow P=512-\left(\frac{512}{2}+\frac{512}{2^2}+\frac{512}{2^3}+...+\frac{512}{2^{10}}\right)\)
Đặt \(A=\frac{512}{2}+\frac{512}{2^2}+\frac{512}{2^3}+...+\frac{512}{2^{10}}\)
\(\Rightarrow2A=512+\frac{512}{2}+\frac{512}{2^2}+...+\frac{512}{2^9}\)
\(\Rightarrow2A-A=512-\frac{512}{2^{10}}\)
\(\Rightarrow A=512-\frac{512}{2^{10}}\)
\(\Rightarrow P=512-A=512-\left(512-\frac{512}{2^{10}}\right)=\frac{512}{2^{10}}=\frac{1}{2}\)
\(P=512-\frac{512}{2}-\frac{512}{2^2}-\frac{512}{2^3}-...-\frac{512}{2^{10}}\)
\(\Rightarrow P=2^9-\frac{2^9}{2}-\frac{2^9}{2^2}-\frac{2^9}{2^3}-...-\frac{2^9}{2^{10}}\)
\(\Rightarrow P=2^9-2^8-2^7-2^6-...-\frac{1}{2}\)
\(\Rightarrow2P=2^{10}-2^9-2^8-2^7-...-1\)
\(\Rightarrow2P-P=2^{10}-2^9-2^8-2^7-...-1-\left(2^9-2^8-2^7-2^6-...-\frac{1}{2}\right)\)
\(\Rightarrow2P-P=2^{10}-2^9-2^8-2^7-...-1-2^9+2^8+2^7+2^6+...+\frac{1}{2}\)
\(\Rightarrow P=2^{10}-2^9-2^9+\frac{1}{2}\)
\(\Rightarrow P=2^{10}-2.2^9+\frac{1}{2}\)
\(\Rightarrow P=2^{10}-2^{10}+\frac{1}{2}\)
\(\Rightarrow P=0+\frac{1}{2}\)
\(\Rightarrow P=\frac{1}{2}.\)
Chúc bạn học tốt!
5^12:5^8=5^4
7^9:7^6=7^3
5^5.5^3=5^8
\(5^{12}:5^8=5^4\)
\(7^9:7^6=7^3\)
\(5^5.5^3=5^8\)
\(4^5.2=2^{10}.2=2^{11}\)