Em tham khảo nha:
\(\begin{array}{l}F{e_2}{(S{O_4})_3} + 3Ba{(N{O_3})_2} \to 2Fe{(N{O_3})_3} + 3BaS{O_4}\\F{e_2}{(S{O_4})_3} + 6KOH \to 3{K_2}S{O_4} + 2Fe{(OH)_3}\\F{e_2}{(S{O_4})_3} + 3Ba{(OH)_2} \to 3BaS{O_4} + 2Fe{(OH)_3}\\MgC{l_2} + 2KOH \to Mg{(OH)_2} + 2KCl\\MgC{l_2} + Ba{(OH)_2} \to Mg{(OH)_2} + BaC{l_2}\\{H_2}S{O_4} + Ba{(N{O_3})_2} \to 2HN{O_3} + BaS{O_4}\\{H_2}S{O_4} + 2KOH \to {K_2}S{O_4} + 2{H_2}O\\{H_2}S{O_4} + Ba{(OH)_2} \to BaS{O_4} + 2{H_2}O\end{array}\)
\(\begin{array}{l}Fe_2(SO_4)_3+3Ba(NO_3)_2\to 2Fe(NO_3)_3+3BaSO_4\\Fe_2(SO_4)_3+6KOH\to 2Fe(OH)_3+3K_2SO_4\\Fe_2(SO_4)_3+3Ba(OH)_2\to 2Fe(OH)_3+3BaSO_4\\MgCl_2+2KOH\to Mg(OH)_2+2KCl\\MgCl_2+Ba(OH)_2\to Mg(OH)_2+BaCl_2\\H_2SO_4+Ba(NO_3)_2\to BaSO_4+2HNO_3\\H_2SO_4+2KOH\to K_2SO_4+2H_2O\\H_2SO_4+Ba(OH)_2\to BaSO_4+2H_2O\end{array}\)
Mọi người giúp em vớiiiiiiiiiiiiiiiii
Tìm GTLN, GTNN nếu có thể $A=3x(x+2y)-2y(3x-2y)-(x^2-5)$
một người bán dc 150 kg trong 3 buổi .Buổi sáng người đó bán dc 60% số gạo đó ,buổi chiều bán dc 45%số gạo còn lại .Hỏi buổi tối người đó bán dc bao nhiêu kg gạo ????
149. I’ll try ........................................... such a foolish thing again. A) not to cause B) to not cause C) not causing D) to cause not 150. Susan has decided ......................... her friends ...................... as she pleases. A) allow/ do B) to allow/ to do C) deciding/ do D) deciding/ doing 151. Everybody would like ................................ to a higher position. A) promote B) promotes C) promoting D) to promote 152. He climbed over the wall without ............................ by anybody. A) seeing B) to see C) being seen D) to be seen 153. I remember ................................ a toy car on my fifth birthday. A) to be given B) being given C) to give D) giving 154. They always try .................. ................ the bridge as they promised before. A) to postpone/ to build B) postpone/ build C) to postpone/ building D) postponing/ built 155. I can’t help .......................... for her acceptance. A) to wait B) waiting C) wait D) waited 156. Don’t be afraid of .......................... that animal. A) touch B) touches C) touching D) to touch 157. I am accustomed to ......................... on my own. A) living B) to live C) live D) lives 158. They are looking forward to ...................... your news. A) hear B) to hear C) hearing D) heard 159. American women have got used to .................independently recently. A) live B) to live C) living D) lives 160. We won’t let you............... what we are going to do with him. A) know B) to know C) knowing D) known
3x^4+x^3+6x-5 chia cho x^2+1 Gấp ạ
giải giúp mình với mình đang cần gấp
116. I like ...................to school by bus, but I hate ............... in the rain and wait for it. A) go/ to stand B) to go/ stand C) going/ standing D) went/ stood 117. Does your sister like ...................? A) cooks B) cooking C) to be cooked D) being cooked 118. This girl can’t bear .................... alone. A) am B) to be C) being D) been 119. My uncle has given up ....................... A) to smoke B) smoke C) smokes D) smoking 120. Do you mind .................... to John ask him ............................ us? A) speaking/ to help B) to speak/ help C) speak/ help D) speaks/ to help 121. I’ll begin ........................... this novel later. A) read B) to reading C) reading D) to read 122. Please stop ................................... me in the middle of the sentence. A) interrupt B) to interrupt C) interrupting D) interrupts 123. My brother gave up ................................. two years ago. A) smokes B) smoke C) to smoke D) smoking 124. We arranged ..................... the scientists here. A) met B) to meet C) meeting D) meet 125. I wish .................. the principal at my school. A) see B) to see C) seeing D) saw 126. My girl friend is afraid of ................. out alone when it gets dark. A) goes B) to go C) going D) go 127. He continues ....................... after his illness. But now, he is having stomachache. A) working B) to work C) worked D) works 128. I’d like ......................... there .......................... my girlfriend’s parents. A) go/ see B) to go/ to see C) going/ seeing D) goes/ seen 129. Would you like ........................ to the party with us? A) come B) to come C) coming D) came 130. I was very tired. I tried .......................... my eyes open, but I couldn’t. A) keep B) kept C) keeping D) to keep 131. I want ............. a pair of shoes in this shop, but I need to try ....................... them. A) buy/ to wear B) to buy/ to wear C) buying/ wearing D) to buy/ wearing 132. We have to go ................ this morning. A) shopping B) shopped C) being shopped D) to be shopped 133. He spent hours trying ..................... the clock. A) repair B) to repair C) repairing D) repairs 134. It’s no use ............................. for her arrival. A) wait B) to wait C) waiting D) waits 135. Is there anything worth ................... here? A) buy B) to buy C) buys D) buying 136. The biologist doesn’t allow us ..................... in the laboratory. A) smoke B) to smoke C) smoking D) smoked 137. Would you mind ....................... your address on the back of this check? A) write B) to write C) writing D) written 138. I don’t enjoy .................... to the dentist’s. A) go B) to go C) going D) goes 139. I don’t regret .......................... her what I thought even if it upset her. A) to tell B) told C) tell D) telling 140. Remember ........................ Katie my greeting card when you see him. A) give B) to give C) giving D) gave 141. My friends has given up ...................... and prefers ..................... pork. A) drink/ eat B) to drink/ eating C) drinking/ eating D) drank/ eat 142. I had to ask the boys .......................... ................................. billiards all the day. A) to stop/ playing B) to stop/ to play C) stopping/ playing D) stops/ to play 143. My teacher promised ................... me .......................... for my next examination. A) help/ prepare B) to help/ prepare C) helping/ to prepare D) helped/ preparing 144. I would like him ......................... ............................ more English lessons. A) to start/ take B) to start/ taking C) starting/ take D) starting/ taking 145. I hate .......................... ................. aloud without ....................... the new words. A) practise/ reading/ learn B) to practise/ to read/ to learn C) to practise/ reading/ learning D) practises/ reading/ to learn 146. She doesn’t want you .......................... to her arriving. A) mention B) to mention C) mentioning D) mentions 147. Did you manage .......................... ..................... these parcels alone? A) finishing/ to pack B) finishing/ packing C) to finish/ to pack D) to finish/ packing
Cho Tam Giác ABC có diện tích 60cm2 Trên Bc lấy điểm M sao cho BM=CM.Nối A với M trên Am lấy điểm D sao cho AD=DM nối B với D , C với D Kéo dài BD cắt AC tại E.Tính diện tích ABE Giúp em với ạ🤧🤧
Cho tứ giác lồi ABCD có ABC = ADC. M là trung điểm của BD. X, Y lần lược là hình chiếu của C trên các đường thảng AB, AD. Chứng minh rằng MX = MY
Giải giúp mk câu này với ah- gấp ah
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