Ta có: 4 .3x+2 - 2.3x =306
4. 3x . 32 -2.3x = 306
( 4.32 - 2) . 3x = 306
34 . 3x = 306
3x = 306/34 = 9 =32
=> x=2
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Ta có: 4 .3x+2 - 2.3x =306
4. 3x . 32 -2.3x = 306
( 4.32 - 2) . 3x = 306
34 . 3x = 306
3x = 306/34 = 9 =32
=> x=2
tìm \(x\)biết:
\(4.3^{x+1}+2.3^{x-2}=4.3^6+2.3^9\)
2.3^x+3^x+1+4.3^x+2=3321
ai làm đúng cho 3 tick
2.3^x-2.9^x =4.3^x giúp mik vs
tìm x
câu 1 : 5^x+4-3.5^x+3=2.5^11
câu 2 : 2.3^x+2+4.3^x+1=10.3^6
câu 3 :6.8^x-1+8^x+1=6.8^19+8^2
giúp tớ nha . Cảm ơn
2.3^x + 3^2+x=891 tim x
tim x (-2/1.3+-2/3.5+...+-2/47.49)-2(x+1)=-3/1.2+-3/2.3+...+-3/48.49
tim x ,
a, 2^8.4 .x=128,
b, 2.3^8 +3^x-1=63
Tim x biet 2.3x+2+3x+1+3x-1=26.92
tim x
(x+1.2)+(x+2.3)+...............+(x+99.100)=334290