2ˣ⁺³ + 5 . 2ˣ = 104
2ˣ.(2³ + 5) = 104
2ˣ.(8 + 5) = 104
2ˣ.13 = 104
2ˣ = 104 : 13
2ˣ = 8
2ˣ = 2³
x = 3
2ˣ⁺³ + 5 . 2ˣ = 104
2ˣ.(2³ + 5) = 104
2ˣ.(8 + 5) = 104
2ˣ.13 = 104
2ˣ = 104 : 13
2ˣ = 8
2ˣ = 2³
x = 3
2^3.x+5^2=45-2x giup mik giai bai nay nhe mik can gap lam
tim x biet:
a, 8x - 75 = 5x + 21
b, 9x + 25 = -( 2x - 58 )
c, / 2x - 1 / = /-5/
Giup minh lam bai nay voi ca cach lam nua nhe
Cac AC giup em bai nay voi a
Cho A=1=3=3^2+3^3+....+3^125
a,Thu gon A(Tinh A)
b,Tim chu so tan cung cua B
c,Tim x de 2A=3^2x-1
d,Chung minh rang A chia het cho 4
a)|x|=5
b)|x|+3=7
c)|a|-2=3
d)|2x-4|+7=10
bai nay mk cần gap cac ban vie
1) tinh hop ly
(81 x 19 + 81 x 27) : 81
giup cho mik bai nay voi
bai 1:tim x
a,(27.x+6):3-11=9
b,(15-6x).35=36
c,(2x-6).47=49
giup minh voi !!!!!!!!!
giup mik voi!!
a) 3^x+x^2=1
b) (3x-14)^n=1
c) (5^2x.5^x+1):5=125
3^x+3^x+1+3^x+2=243.39
bai 1 : a, cho S=5+52+53+54+55+56+.........+52012 chung to S chia het cho 65
b, tim stn nho nhat sao cho khi chia cho 11 du 6, 4 du 1, 19 du 11
c, chung to A=10n+18n-1 chia het cho 27 ( voi n la so tu nhien )
bai 2
tim x,y biet 2x.(3y-2)+(3y-2)= -55
bai 3
cho bieu thuc a-b chia het cho 6
chung minh cac bieu thuc sau cung chia het cho 6
a, a+5b
b, a-13b
giup mik voi !!!!!!!!!!!!!
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