Can you help me please ? { x ^2 - [ 6^ 2 - ( 8^2 - 9 * 7 ) ^3 - 7*5 ] ^ 3 } = 89 -102
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AM
1
22 tháng 7 2017
. dùng máy tính là ra mà bạn =))
\(x^2-\left[6^2-\left(8^2-9.7\right)^3-7.5\right]^3=89-102\)
\(x^2\left[36-\left(64-63\right)^3-35\right]^3=-13\)
\(x^2-0^3=-13\)
\(x^2=-13\)( Vô lý)
=> x không xác định
28 tháng 9 2017
Tổng A có số số hạng là : ( 1000 - 1 ) : 1 + 1 = 1000 ( số )
suy ra A bằng : ( 1000 + 1 ) . 1000 : 2 = 500500
chỗ B mk ko bt tự nhiên nhảy đâu ra 74 thì chịu
Tổng C có số số hạng là : ( 1001 - 1 ) . 2 + 1 = 2001 ( số )
suy ra C bằng : ( 1001 + 1 ) . 2001 : 2 = 1 002 501
kb vs mk nhá
C
17 tháng 6 2017
\(a\left(\frac{1}{2}-\frac{1}{4}+....+\frac{1}{8}-\frac{1}{10}\right).y=\frac{1}{3}\)
\(\left(\frac{1}{2}-\frac{1}{10}\right).y=\frac{1}{3}\)
\(\frac{2}{5}.y=\frac{1}{3}\)
\(y=\frac{1}{3}:\frac{2}{5}\)
\(y=\frac{5}{6}\)
\(b,\left(\frac{1}{1}-\frac{1}{3}+\frac{1}{3}-\frac{1}{5}+....+\frac{1}{9}-\frac{1}{11}\right).y=\frac{2}{3}\)
\(\left(\frac{1}{1}-\frac{1}{11}\right).y=\frac{2}{3}\)
\(\frac{10}{11}.y=\frac{2}{3}\)
\(y=\frac{2}{3}:\frac{10}{11}\)
\(y=\frac{22}{30}\)
TT
3
17 tháng 4 2017
\(1-\)\(a,\frac{7}{8}-\frac{2}{3}=\frac{21}{24}-\frac{16}{24}=\frac{5}{24}\)
\(b,\frac{7}{8}-\frac{2}{3}\times\frac{3}{4}=\frac{7}{8}-\frac{1}{2}=\frac{7}{8}-\frac{4}{8}=\frac{3}{8}\)
\(2-\)\(a,\frac{5}{8}-x=\frac{5}{9}\)
\(x=\frac{5}{8}-\frac{5}{9}\)
\(x=\frac{5}{72}\)
\(b,\frac{3}{4}:x=\frac{2}{5}\)
\(x=\frac{3}{4}:\frac{2}{5}\)
\(x=\frac{15}{8}\)
LD
23 tháng 6 2017
1. may / it / rain / tomorrow
it may rain tomorrow
2. you / do / could / a / me / favor
could you do me a favor?
3. you / could / form / for / me / fill / in / this?
could you fill in this form for me?
4. we / should/do/what/to/help/street/children?
what should we do to help street children?
5. out/this/please/application/fill/form?
please fill out this application form.
6. suggest/I/we/for/the/poor/should/funds/raise
I suggest we should raise funds for the poor
7. by/elderly/can/them/shopping/people/we/for/doing/help
we can help elderly people by doing shopping for them
8. carry/my/bags/can/me/you/help?
can you help me carry my bags?
23 tháng 6 2017
1. may / it / rain / tomorrow
=> It may rain tomorrow.
2. you / do / could / a / me / favor
=> Could you do me a favor?
3. you / could / form / for / me / fill / in / this?
=> Could you fill in this form for me?
4. we / should/do/what/to/help/street/children?
=> What should we do to help street children?
5. out/this/please/application/fill/form?
=> Please fill out this application form.
6. suggest/I/we/for/the/poor/should/funds/raise
=> I suggest we should raise funds for the poor.
7. by/elderly/can/them/shopping/people/we/for/doing/help
=> We can help elderly people by doing shopping for them.
8. carry/my/bags/can/me/you/help?
=> Can you help me carry my bags?
13 tháng 6 2017
4 + x = 7 - 2x
4 + x + 2x = 7
4 + 3x = 7
3x = 7 - 4
3x = 3
x = 3 : 3
x =1
13 tháng 6 2017
5 + x = 8,3 + 4,7 - x
5 + x + x = 8,3 + 4,7
5 + 2x = 13
2x = 13 - 5
2x = 8
x = 8 : 2
x= 4
22 tháng 10 2016
Vì bạn không rõ ai hỏi ai nên mình sẽ lấy mặc định là A asked B nhé
1. " Please take these books to my classroom "
=> A asked B to take these books to A's classroom.
2. " Can you buy me some soap on your way home ? "
=> A asked B if B could buy A some soap on B's way home.
3. " Please turn on the radio for me ? "
=> A asked B to turn on the radio for A
4. " Could you do the washing up for me ? "
=> A asked B if B could do the washing up for A
5. " Can you make me some cool drink ? "
=> A asked B if B could make A some cool drink
6. " Please clean up the room before you leave "
=> A asked B to clean up the room before B leave.
7. " Don't eat green fruit "
=> A asked B not to eat green fruit.
8. " Don't stay up late "
=> A asked B not to stay up late.
9. " Can you help us with these new words ? "
=> A asked B if B could help them with those new words
10. " Could you lend me your dictionary ? "
=> A asked B if B could lend A B's dictionary.
TT
10 tháng 4 2021
\(\dfrac{6}{13}.\dfrac{8}{7}+\dfrac{6}{13}.\dfrac{9}{7}-\dfrac{3}{13}.\dfrac{6}{7}=\dfrac{6}{13}.\left(\dfrac{8}{7}+\dfrac{9}{7}\right)-\dfrac{3}{13}.\dfrac{6}{7}=\dfrac{6}{13}.\dfrac{17}{7}-\dfrac{3}{13}.\dfrac{6}{7}=\dfrac{102}{91}-\dfrac{18}{91}=\dfrac{12}{13}\)
17 tháng 7 2015
a) 60 - 3 ( x - 2 ) = 51
=> 3 (x - 2) = 60 - 51 = 9
=> x - 2 = 9 : 3 = 3
=> x = 3 = 2 = 5
b) 4x - 20 = 2^5 : 2^2
=> 4x - 20 = 8
=> 4x = 8 + 20 = 28
=> x = 28 : 4 = 7
c) 48751 - ( 10425 + x ) = 382^8 : 12
đề có sai ko ?
d) ( 2367 - x ) - ( 2^10 - 7 ) = 15^2 - 20
=> 2367 - x - 2^10 + 7 = 205
=> -x = 205 - 7 + 210 - 2367 = -1145
=> x = 1145
28 tháng 9 2017
câu D của bạn trần như sai rồi phải là 1146 mới là đáp án đúng
Wow 1 câu olm một câu hoc24 Câu hỏi của Aino Minako