Help me
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24 - 16(x - 1/2) = 23
=> 16(x - 1/2) = 24 - 23
=> 16(x - 1/2) = 1
=> x - 1/2 = 1/16
=> x = 1/16 + 1/2
=> x = 9/16
\(24-16(x-\frac{1}{2})=23\)
\(16(x-\frac{1}{2})=24-23\)
\(16(x-\frac{1}{2})=1\)
\(x-\frac{1}{2}=\frac{1}{16}\)
\(x=\frac{1}{16}+\frac{1}{2}\)
\(x=\frac{9}{16}\)
Vậy số thực x cần tìm là \(\frac{9}{16}\)
Chúc bạn hok tốt ~
I am sorry, I can’t help you.” Peter said to me.
A. Peter promised to help me. B. Peter refused to help me.
C. Peter asked me for help. D. I couldn’t help Peter.
To make Peter surprised, we _______ and when he comes, we ________.
A. are going to hide / will jump out and shout B. will hide / are jumping out and shouting
C. are hiding / are going to jump out and shout D. are hiding / are jumping out and shouting
It’s kind of you to help me wash the dishes after the party.
A. Washing the dishes is kind of you to help me.
B. You are so kind when you help me wash the dishes.
C. To help me wash the dishes after the party you are kind.
D. It’s your kind to help me with the dishes after the party.
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So sánh:\(10^{10}\) và \(48.50^5\)
Ta có:
\(10^{10}=10^{2.5}=\left(10^2\right)^5=100^5=\left(2.50\right)^5=2^5.50^5=32.50^5\)
Vì \(32.50^5< 48.50^5\)
\(\Rightarrow10^{10}< 48.50^5\)
Our Greener Would will able to have a clean air. It has many green trees around the Earth. Air around the world will not be able to pollute the air. People will not be affected by breathing. So, I love it so much.
Hơi ngắn
Our green world will be able to have a clean air. It has many green trees around the Earth. Air around the world will not be able to pollute the air. People will not be affected by breathing. So, I love it so much.
3:
a: 5^n luôn có chữ số tận cùng là 5 với mọi n là số tự nhiên
=>5^100 có chữ số tận cùng là 5
b: \(2^{4k}\) có chữ số tận cùng là 6 với mọi k là số tự nhiên
mà 100=4*25
nên 2^100 có chữ số tận cùng là 6
c: 2023 chia 2 dư 1
mà \(9^{2k+1}\) luôn có chữ số tận cùng là 9
nên \(9^{2023}\) có chữ số tận cùng là 9
d: 2023 chia 4 dư 3
\(7^{4k+3}\left(k\in N\right)\) luôn có chữ số tận cùng là 3
Do đó: \(7^{2023}\) có chữ số tận cùng là 3
Quy luật:
+) các số có c/s tận cg là 0,1,5,6 nâng lên lũy thừa bậc nào (≠0) thì c/s tận cg vẫn là nó.
+) các số có tận cg là 2,4,8 nâng lên lt bậc 4n(n≠0) thì đều có c.s tận cg là 6.
+)các số có c/s tận cg là 3,7,9 nâng lên lt bậc 4n(n≠0) thì đều có c/s tận cg là 1.
+) số có tận cg là 3 khi nâng lên lũy thừa bậc 4n+3 sẽ có tận cùng là 7
+) số có tận cg là 7 khi nâng lên lũy thừa bậc 4n+3 sẽ có tận cùng là 3
+) số có tận cg là 2 khi nâng lên lũy thừa bậc 4n+3 sẽ có tận cùng là 8
+) số có tận cg là 8 khi nâng lên lũy thừa bậc 4n+3 sẽ có tận cùng là 2
+) số có c/s tận cg là 0,1,4,5,6,9 khi nâng lên lũy thừa bậc 4n+3 thì c/s tận cg là chính nó
Bài 3: áp dụng quy luật bên trên
\(a.5^{100}=\overline{..5}\)
\(b.2^{100}=2^{4.25}=\overline{..6}\)
\(c.9^{2023}=\overline{..9}\)
\(d.7^{2023}=7^{4.505+3}=\overline{...3}\)
Bài 4:
\(A=17^{2008}-11^{2008}-3^{2008}\)
\(=\left(\overline{...7}\right)^{4.502}-\left(\overline{..1}\right)^{2008}-\left(\overline{..3}\right)^{4.502}\)
\(=\overline{..1}-\overline{...1}-\overline{...1}\)
\(=\overline{..9}\)
Bài 5:
\(M=17^{25}+24^4-13^{21}\)
\(=\left(\overline{..7}\right)^{4.6}.\left(\overline{..7}\right)+\left(\overline{..4}\right)^{4.1}-\left(\overline{..3}\right)^{4.5}.\left(\overline{..3}\right)\)
\(\overline{..1}.\overline{..7}+\overline{..6}-\overline{..1}.\overline{..3}\)
\(=\overline{...7}+\overline{..6}-\overline{..3}\)
\(=\overline{...0}\)
\(=>M⋮10\)
1, Văn bản được trích từ văn bản " Lao xao", của Duy Khán, biện pháp nghệ thuật được sử dụng ở đoạn văn trên là so sánh, nhân hóa.
2. Bài thuộc thể loại kí, phương thức biểu đạt được dùng trong bài là miêu tả và tự sự.
3 Đó là câu kể:
Xác định thành phần câu như sau:
Ong vàng, ong vò vẽ, ong mật đánh lộn nhau để hút mật hoa
( in nghiêng là chủ ngữ, in đậm là vị ngữ )
Tự luận:
1. Bài làm
Khi mọi thứ vẫn chìm vào trong giấc ngủ, vạn vật yên tĩnh, thì từ phía xa ta thấy những đám mây ửng hồng đang trôi dạt trên tấm nhung đen. Dạng đông đã đến.
Lấp ló sau những đám mây ửng hồng ấy, ta thấy ông mặt trời dần nhô lên. Mặt trời tròn trĩnh, phúc hậu như lòng đỏ quả trứng gà thiên nhiên đầy đặn ban phát từng tia nắng sớm cho trần gian. Có mặt trời vạn vật như bừng tỉnh, lấy lại sức sống cho một ngày dài mới. Những chú gà con cùng chị mái mơ đi ra vườn bắt đầu tìm kiếm bữa sáng. Có những chú gà còn đi chưa vững, chân này giẫm chân kia, nhìn mà thấy tội. Anh gà trống oai vệ, đạp chân vào đống rơm rồi lấy một hơi gáy to vang cả xóm làng. Các bác trâu già ngồi trầm ngâm nhai cỏ như suy tư và việc gì đó. Chị hồng kiêu sa hôm nay có chiếc áo thật đẹp, chúng được đính thêm những viên kim cương lấp lánh làm từ những giọt sương ban mai. Cô hoa lan vẫn dịu dàng, thùy mị, khoe sắc ở một thế giới riêng của cô. Các bác ổi, mít,... ngồi tán chuyện xì xào chả khác nào mấy bà tám buôn chuyện ở chợ. Từ đâu đó, chim muông cũng tụ họp tại đây. Cùng hót với nhau như đang tập dàn đồng ca. Nhưng trời chỉ vừa chớm sáng thôi, cho đến khi lên cao hơn chút nữa tôi mới thấy ông mặt trời như một quả bóng khổng lồ tỏa sáng. Những tia nắng của ông thật trìu mến và ấm áp. Xuyên qua các tán cây ta thấy những tia nắng ấy như đang nhảy nhót vui vẻ vậy.
( Đây là phần gợi ý ban đầu của mik, chúc bn học tốt )
Thanks bn nhìu nhé! bn là nam hay nữ mà viết văn có hồn ghê ak