Cho hệ pt :
ax+by =3
ax2+by2=5ax2+by2=5
ax3+by3=9ax3+by3=9
ax4+by4=17ax4+by4=17
Tính
ax5+by5,ax2013+by2013=?ax5+by5,ax2013+by2013=?
Những câu hỏi liên quan
Các số thực a,b,x,y thỏa mãn:ax4+by4
1.__________ is your telephone number?A. When B. WhichC. WhatD. Why2.Nga lives ________ 52 Nguyen Dinh Chieu street.A. atB. on C. inD. by3.Her birthday party is _______ Friday, August 20thA. atB. onC. inD. by4.________ you have a test tomorrow morning?A. Will B. doC. areD. does5.__________ is your brother?A. How ageB. What ageC. How oldD. B&C are correct6.Nhat _______ 9 years old on his next birthdayA. isB. willC. will beD. isn’t7.Whens your______?A. birthday B. day of birth C. date of birthD. b...
Đọc tiếp
1.__________ is your telephone number?A. When B. WhichC. WhatD. Why2.Nga lives ________ 52 Nguyen Dinh Chieu street.A. atB. on C. inD. by3.Her birthday party is _______ Friday, August 20thA. atB. onC. inD. by4.________ you have a test tomorrow morning?A. Will B. doC. areD. does5.__________ is your brother?A. How ageB. What ageC. How oldD. B&C are correct6.Nhat _______ 9 years old on his next birthdayA. isB. willC. will beD. isn’t7.When's your______?A. birthday B. day of birth C. date of birthD. birthdate8.Ba: Will he be free on Sunday? Nam:______A. A. No, he won't B. No, he doesn't C. No.he isn'tD. No, he will9.White is the color Hoa likes ____________.A. most B. goodC. favoriteD. more than10.What's your______?A. date of birth B. birthdate C. birthdayD. day of birth11.An: Will you be free tomorrow evening?Hoa:______A. Yes, I will B. Yes, I do C. Yes, I amD. Yes, I won't12.Ba: Where will we meet?-Nam:______ the movie theater.
A. In front B. Next C. In front of D. Before
13.When does our new school year begin ? –It’s in ___________.
A August B. September, 5th C. Monday, September D. Thursday
14.Lan will _______some of her friends to her birthday party.
A. tell B. meet C. invite D. see
15.The party will start at 6.00 P.M and_______ at 9.00 P.M
A. finish B. finishes C. finishing D. to finish
1.__________ is your telephone number?A. When B. Which C. What D. Why2.Nga lives ________ 52 Nguyen Dinh Chieu street.A. at B. on C. in D. by3.Her birthday party is _______ Friday, August 20thA. at B. on C. in D. by4.________ you have a test tomorrow morning?A. Will B. do C. are D. does5.__________ is your brother?A. How age B. What age C. How old D. B&C are correct6.Nhat _______ 9 years old on his next birthdayA. is B. will C. will be D. isn’t7.Whens your______?A. birthday B. day of birth C. da...
Đọc tiếp
1.__________ is your telephone number?
A. When B. Which C. What D. Why
2.Nga lives ________ 52 Nguyen Dinh Chieu street.
A. at B. on C. in D. by
3.Her birthday party is _______ Friday, August 20th
A. at B. on C. in D. by
4.________ you have a test tomorrow morning?
A. Will B. do C. are D. does
5.__________ is your brother?
A. How age B. What age C. How old D. B&C are correct
6.Nhat _______ 9 years old on his next birthday
A. is B. will C. will be D. isn’t
7.When's your______?
A. birthday B. day of birth C. date of birth D. birthdate
8.Ba: Will he be free on Sunday? Nam:______A.
A. No, he won't B. No, he doesn't C. No.he isn't D. No, he will
9.White is the color Hoa likes ____________.
A. most B. good C. favorite D. more than
10.What's your______?
A. date of birth B. birthdate C. birthday D. day of birth
11.An: Will you be free tomorrow evening?Hoa:______
A. Yes, I will B. Yes, I do C. Yes, I am D. Yes, I won't
12.Ba: Where will we meet?-Nam:______ the movie theater.
A. In front B. Next C. In front of D. Before
13.When does our new school year begin ? –It’s in ___________.
A August B. September, 5th C. Monday, September D. Thursday
14.Lan will _______some of her friends to her birthday party.
A. tell B. meet C. invite D. see
15.The party will start at 6.00 P.M and_______ at 9.00 P.M
A. finish B. finishes C. finishing D. to finish
1.__________ is your telephone number?
A. When B. Which C. What D. Why
2.Nga lives ________ 52 Nguyen Dinh Chieu street.
A. at B. on C. in D. by
3.Her birthday party is _______ Friday, August 20th
A. at B. on C. in D. by
4.________ you have a test tomorrow morning?
A. Will B. do C. are D. does
5.__________ is your brother?
A. How age B. What age C. How old D. B&C are correct
6.Nhat _______ 9 years old on his next birthday
A. is B. will C. will be D. isn’t
7.When's your______?
A. birthday B. day of birth C. date of birth D. birthdate
8.Ba: Will he be free on Sunday? Nam:______A.
A. No, he won't B. No, he doesn't C. No.he isn't D. No, he will
9.White is the color Hoa likes ____________.
A. most B. good C. favorite D. more than
10.What's your______?
A. date of birth B. birthdate C. birthday D. day of birth
11.An: Will you be free tomorrow evening?Hoa:______
A. Yes, I will B. Yes, I do C. Yes, I am D. Yes, I won't
12.Ba: Where will we meet?-Nam:______ the movie theater.
A. In front B. Next C. In front of D. Before
13.When does our new school year begin ? –It’s in ___________.
A August B. September, 5th C. Monday, September D. Thursday
14.Lan will _______some of her friends to her birthday party.
A. tell B. meet C. invite D. see
15.The party will start at 6.00 P.M and_______ at 9.00 P.M
A. finish B. finishes C. finishing D. to finish
Đúng 1
Bình luận (0)
1. ab ( x - 3 ) - a bình ( x - 3 )
2 . ax + ay + bx + by
3. ax + ay - 2x - 2y
4. 2x - 2y + ax - ay
5. 10ax - 5ay - 2x + y
mình cảm ơn trước ạ
`ab(x-3) -a^2(x-3)`
`=(x-3)(a^2-ab)`
__
`ax+ay+bx+by`
`=a(x+y)+b(x+y)`
`=(x+y)(a+b)`
__
`ax+ay -2x-2y`
`=(ax+ay)-(2x+2y)`
`=a(x+y)-2(x+y)`
`=(x+y)(a-2_`
__
`2x-2y +ax-ay`
`=2(x-y)+a(x-y)`
`=(x-y)(2+a)`
__
`10ax -5ay -2x+y`
`= 5a(2x-y) -(2x-y)`
`=(2x-y)(5a-1)`
Đúng 2
Bình luận (0)
1: =(x-3)(ab-a^2)
=a(b-a)(x-3)
2: =a(x+y)+b(x+y)
=(x+y)(a+b)
3: =a(x+y)-2(x+y)
=(x+y)(a-2)
4: =2(x-y)+a(x-y)
=(x-y)(a+2)
5: =5a(2x-y)-(2x-y)
=(2x-y)(5a-1)
Đúng 0
Bình luận (0)
1) \(ab\left(x-3\right)-a^2\left(x-3\right)=a\left(x-3\right)\left(b-a\right)\)
2) \(ax+ay+bx+by=\left(a+b\right)\left(x+y\right)\)
3) \(ax+ay-2x-2y=\left(a-2\right)\left(x+y\right)\)
4) \(2x-2y+ax-ay=\left(2+a\right)\left(x-y\right)\)
5) \(10ax-5ay-2x+y=5a\left(2x-y\right)-\left(2x-y\right)=\left(5a-1\right)\left(x-y\right)\)
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
(1,5 điểm) Tính
aa ¯ :ax5+45
aa ¯ :ax5+45 = 11 x 5 + 45 = 55 + 45 = 100
Đúng 0
Bình luận (0)
Ax7+Ax9-A-Ax5=290
A x 7 + A x 9 - A - A x 5 = 290
A x 7 + A x 9 - A x 1 - A x 5 = 290
A x ( 7 + 9 - 1 - 5 ) = 290
A x 10 = 290
A = 290 : 10 = 29
Đúng 2
Bình luận (0)
A x 7 + A x 9 - A - A x 5 = 290
A x 7 + A x 9 - A x 1 - A x 5 = 290
A x ( 7 + 9 - 1 - 5 ) = 290
A x 10 = 290
A = 290 : 10
A = 29
Đúng 0
Bình luận (0)
Tính giá trị của a:
a x 4+35+a x 6=ax5+ax10
a×4+35+a×6=a×5+a×10
⇔a×4+a×6-a×5-a×10=-35
⇔a×(4+6-5-10)=-35
⇔a×(-5)=-35
⇔a=-35:(-5)
⇔a=7
Vậy a=7.
1. She ..... met ...... us yesterdaya. is/ by b. was/ with c. was/ by d. didnt/ by2. English ..... everywhere in the worda. speaking b. speaks c. is spoken d. spoke3. Was this house ........ in 2010?a. build b. built c. building d. to build4. Lets ..... dinnera. to cook b. are cooking c. cook d. is cooking5. What time ..... you go to bed last evening? - It was 10.30 pma. do b. were c. did d. was6....
Đọc tiếp
1. She ..... met ...... us yesterday
a. is/ by b. was/ with c. was/ by d. didn't/ by
2. English ..... everywhere in the word
a. speaking b. speaks c. is spoken d. spoke
3. Was this house ........ in 2010?
a. build b. built c. building d. to build
4. Let's ..... dinner
a. to cook b. are cooking c. cook d. is cooking
5. What time ..... you go to bed last evening? - It was 10.30 pm
a. do b. were c. did d. was
6. There aren't ...... boys in dancing club
a. much b. a lot c. more d. any
Cho hàm số
y
f
x
a
x
5
+
b
x
3
+
c
x
+
d
a
,
b
,
c
,
d
∈
ℝ
;
a
≠...
Đọc tiếp
Cho hàm số y = f x = a x 5 + b x 3 + c x + d a , b , c , d ∈ ℝ ; a ≠ 0 . Biết f'(-1)=3 . Tính lim ∆ x → 0 f 1 + ∆ x - f 1 ∆ x
A. 3
B. -3
C. 1
D. -1