( 7²⁰⁰+7¹⁹⁹) : 7¹⁹⁸  = 7²⁰⁰ : 7¹⁹⁸ + 7¹⁹⁹ : 7¹⁹⁸ = 49  + 7 = 56

 ( 7³+7²)x(5³+ 5⁶)x ( 3³x 3-9²) =  ( 7³+7²).(5³+ 5⁶) . ( 3^4 - 3^4) = ( 7³+7²).(5³+ 5⁶) . 0 = 0

câu c thì bn xem lại đề nha 2³x7x5³-( 5²x 65+ 5^{2x 35}) hay 2³x7x5³-( 5²x 65+ 5² x 35)

2³x7x5³-( 5²x 65+ 5²x35) = 8 x 7 x 125 - 5^2( 65+35) = 7000 - 25 . 100  = 7000 - 2500 = 4500

ta có :A=8 bé hơn hoặc =|X-1+X-3+X-5+X-7|=|4X-16|

=>X<(8+16)/4=6(1)

X>(-8+16)/4=2(2)TỪ 1 VÀ 2 =>2<x<6

=>x\(\in\)(3;4;5)

Khó mới cần các bạn giúp  

Đáp án là 7430 .

=7430

(x+1)+(x+2)+(x+3)+(x+4)=110

(x+x+x+x)+(1+2+3+4)=110

4x+10=110

4x=110-10

4x=100

x=100:4

x=25

[ x + 1 ] + [ x + 2 ] + [ x + 3 ] + [ x + 4 ] = 110

=> x + 1 + x + 2 + x + 3 + x + 4 = 110

=> ( x + x + x + x ) + ( 1 + 2 + 3 + 4 ) = 110

=> 4x + 10 = 110

=> 4x = 100

=> x = 25

(x + 1) + (x + 2) + (x + 3) + (x + 4) = 110

=> x + 1 + x + 2 + x + 3 + x + 4 = 110

=> 4x + (1 + 2 + 3 + 4) = 110

=> 4x + 10 = 110

=> 4x = 110 - 10

=> 4x = 100

=> x = 100 : 4 = 25

a) -1500

b) -3312

a) 53x-15 + -15x47

=-15x(53+47)

=-15x100

=-1500

b)-43x92-46x27+46x41

=-43x2x46 -46x27 +46x41

=46x(-86-27+41)

=46x-72

=-3312

a, 53.(-15)+(-15).47

=(-15).(53+47)

=(-15).100

= -1500

b,-43.92-46.27+46.41

ko lam corona day

=-43.92-46.(27+41)

=-43.92-46.68

35 + 9 x 0 = 35 + 0 = 35

@Sophia

#flower

35 + 9 × 0

= 35 + 0

= 35

Bằng 35 nha

S=1/2x 2/3x 3/4x............x2016/2017

S=1/1x 1/2017

S=1/2017

\(S=\left(1-\frac{1}{2}\right).\left(1-\frac{1}{3}\right).....\left(1-\frac{1}{2017}\right)\)

\(S=\frac{1}{2}\cdot\frac{2}{3}\cdot\cdot\cdot\cdot\cdot\cdot\cdot\frac{2016}{2017}\)

\(S=\frac{1.2........2016}{2.3..........2017}\)

\(S=\frac{1}{2017}\)

\(S=\left(1-\frac{1}{2}\right)x\left(1-\frac{1}{3}\right)x...x\left(1-\frac{1}{2017}\right)\)

\(=\frac{1}{2}x\frac{2}{3}x...x\frac{2016}{2017}\)

\(=\frac{1}{2017}\)

a) \(8x+56:14=60\)

\(\Rightarrow8x+4=60\)

\(\Rightarrow8x=56\)

\(\Rightarrow x=\dfrac{56}{8}\)

\(\Rightarrow x=7\)

b) Mình làm rồi nhé !

c) \(41-2^{x+1}=9\)

\(\Rightarrow2^{x+1}=41-9\)

\(\Rightarrow2^{x+1}=32\)

\(\Rightarrow2^{x+1}=2^5\)

\(\Rightarrow x+1=5\)

\(\Rightarrow x=4\)

d) \(3^{2x-4}-x^0=8\)

\(\Rightarrow3^{2x-4}-1=8\)

\(\Rightarrow3^{2x-4}=9\)

\(\Rightarrow3^{2x-4}=3^2\)

\(\Rightarrow2x-4=2\)

\(\Rightarrow2x=6\)

\(\Rightarrow x=3\)

g) \(65-4^{x+2}=2014^0\)

\(\Rightarrow65-4^{x+2}=1\)

\(\Rightarrow4^{x+2}=64\)

\(\Rightarrow4^{x+2}=4^3\)

\(\Rightarrow x+2=3\)

\(\Rightarrow x=1\)

i) \(120+2\left(4x-17\right)=214\)

\(\Rightarrow2\left(4x-17\right)=214-120\)

\(\Rightarrow2\left(4x-17\right)=94\)

\(\Rightarrow4x-17=47\)

\(\Rightarrow4x=47+17\)

\(\Rightarrow4x=64\)

\(\Rightarrow x=16\)

a: \(8x+56:14=60\)

=>8x+4=60

=>8x=60-4=56

=>x=56/8=7

b: \(5^{2x-3}-2\cdot5^2=5^2\cdot3\)

=>\(5^{2x-3}=5^2\cdot3+2\cdot5^2=5^3\)

=>2x-3=3

=>2x=6

=>x=3

c: \(41-2^{x+1}=9\)

=>\(2^{x+1}=41-9=32\)

=>x+1=5

=>x=4

d: \(3^{2x-4}-x^0=8\)

=>\(3^{2x-4}-1=8\)

=>\(3^{2x-4}=8+1=9\)

=>2x-4=2

=>2x=6

=>x=3

g: \(65-4^{x+2}=2014^0\)

=>\(65-4^{x+2}=1\)

=>\(4^{x+2}=65-1=64\)

=>x+2=3

=>x=1

i: 120+2(4x-17)=214

=>2(4x-17)=214-120=94

=>4x-17=94/2=47

=>4x=64

=>\(x=\dfrac{64}{4}=16\)