{[(32 + 1 ) . 10 - ( 8:2 + 6 )]: 2} + 55 - (10 : 5)3
=\(\left\{\left[33.10-(4+6)\right]:2\right\}+55-2.3\)
=\(\left\{\left[330-10\right]:2\right\}+55-6\)
=\(\left\{320:2\right\}+49\)
=\(160+49\)
=209
{[(32 + 1 ) . 10 - ( 8:2 + 6 )]: 2} + 55 - (10 : 5)3
=\(\left\{\left[33.10-(4+6)\right]:2\right\}+55-2.3\)
=\(\left\{\left[330-10\right]:2\right\}+55-6\)
=\(\left\{320:2\right\}+49\)
=\(160+49\)
=209
1+1+2-3+2*5/6+7/8*9-10=?
1) Rút gọn p/s:
a) 6*9 - 2*17 / 63*3 - 119
b) 2*3 + 4*6 + 14*21 / 3*5 + 6*10 + 21*35
c) 3*13 - 13*18 / 15*40 - 80
d) (-5)^3*40*4^3 / 135 * (-2)^14 * (-100)^0
e)18*34+(-18)*124 / -36 *17 +9*(-52)
tinh
B=7*6^10*2^20*3^6-2^19*6^15/9*6^19*2^9-4*3^17*2^26
Bài 10: Xét tính đúng sai của các suy luận sau: (mệnh đề kéo theo)
1) x2 = 4 => x = 2;
2) x2 = 4 <=> x = 2;
3) \(\left|x-1\right|=1=>x=2\)
4) \(\sqrt{x-1}=2=>x-1=4\)
5) \(\dfrac{2x+1}{x}=4x=>2x+1=4x^2\)
6) x2+3x-4=0 => x=1
7) \(\sqrt{P\left(x\right)}=g\left(x\right)=>P\left(x\right)=\left(g\left(x\right)\right)^2\)
8) \(\dfrac{x^2+5x-6}{x-1}=2x-5< =>x=11\)
Câu 1 :
1)Tính nhanh:a)(1+ -5/4)+(-3/4-2)
b)340.(-42)-34.580
2)Tìm x biết:a)x/6-1/3=-3/2
b)3-/x+5/=-4
Câu 2 :
1)Tìm các số nguyên n biết:
a)-5/6+8/3+29/-6<n<-1/2+2+5/2
b)4n+1 chia hết cho 2n-1
2)so sánh M=24.54+54.26/53.15 và N=-25/-2
(X-3)(x+3)-2(x-5)^2+x(x-10)
\(\dfrac{1}{\sqrt{1}-\sqrt{2}}-\dfrac{1}{\sqrt{3}-\sqrt{4}}+\dfrac{1}{\sqrt{4}-\sqrt{5}}-\dfrac{1}{\sqrt{5}-\sqrt{6}}+\dfrac{1}{\sqrt{6}-\sqrt{7}}-\dfrac{1}{\sqrt{7}-\sqrt{8}}+\dfrac{1}{\sqrt{8}-\sqrt{9}}\)
Đặt câu :
1.Tutor =>
2.Shelter =>
3.Nursing home =>
4.Mural =>
5.Blanket =>
6.Sort =>
7. Teenagers = teens = teener =>
8.Youth =>
9.Offer =>
10.The Poor =>
11.Coupon =>
Thì nào cx đc nha các bạn...
Vy cảm ơn
cho a bang 1/2+1/3+1/4+1/5+1/6+1/7+1/8
so sanh tong a voi 5/6
giai ro
ai lam dung minh tick cho