3X的2次方X的6次方乘以X的5次方乘以X的4次方等于多少-搜答案-大师作文网

再答：不客气啦

3^×*9^×*27^×=9^×3^×*27^×=1(3*27)^×=1×=0

两边除9^(1/x)3*(4/9)^(1/x)+(6/9)^(1/x)=23*(4/9)^(1/x)+(2/3)^(1/x)=2令a=(2/3)^(1/x)则3a²+a-2=0(a+1)(3

设a=2^x,b=3^x那么方程是：3a^2+2b^2=5ab(3a-2b)(a-b)=0(1):3a-2b=03*2^x=2*3^x(2/3)^x=2/3x=1(2)a-b=03^x=2^x(3/2

x^20*y^15*z^5=64=>(x^4*y^3*z^1)^5=64=>s=x^8*y^6*z^2=64^(2/5)=2^(7*2/5)=2^(14/5)

第n个:-1的n次方乘以n乘以x的n次方2010个:2010乘以x的2010次方

64^4×8^3=(2^6)^4×(2^3)^3=2^24×2^9=2^(24+9)=2^33

3^x*9^x27^x=9^6∵3^x*9^x27^x=（3*9*27）^x=3^6x即3^6x=9^6∴3^6x=3^12即6x=12∴x=2所以x的值为2.

2*8^x*16^x=2^222*2^3x*2^4x=2^222^7x+1=2^227x+1=22x=3(2^x代表2的X次方)

9^x+4^x=5/2*6^x两边同时除以6^x得：（3/2)^x+(2/3)^x=5/2令t=(3/2)^x,则方程化为;t+1/t=5/2t^2-5/2*t+1=0(t-2)(t-1/2)=0t=

2的x+3次方乘以3的x+3次方=(2×3)的x+3次方=6的x+3次方36的x-2次方=6的2(x-2)次方因为2的x+3次方乘以3的x+3次方等于36的x-2次方所以6的x+3次方=6的2(x-2

-X的五次方..如果是负号在括号内的话应该是X的五次方~希望采纳

令3^x=a则9^x=a²a²-6x-7=0(a-7)(a+1)=0a=3^x>0所以3^x=a=7x=log3(7)

原式=-x^(3+2n-1)-x^(2n+2)=-x^(2n+2)-x^(2n+2)=-2x^(2n+2)

x^(6n)+x^(4n)*x^(5n)=x^(6n)+x^(9n)=[x^(3n)]^2+[x^(3n)]^3=2^2+2^3=4+8=12

x的3a次方=3x的6a次方+2x的4a次方乘以-3xde5a次方=3²-6(x的9a次方)=9-6×27=-153再问：能再具体点吗再答：x的6a次方+2x的4a次方乘以-3xde5a次方

(x-y)^2(x-y)^3*(y-x)^2*(y-x)^3=-(x-y)^2(x-y)^3*(x-y)^2*(x-y)^3=-(x-y)^10

2^(x+1)*3^(x^2)+2^(2x)*3^(2x^2+1)=5=2^x*3^(x^2)*[2+3*2^x*3^(x^2)]令2^x*3^(x^2)=t>0,则有5=t(2+3t)(t-1)(3

=3(x的n次方+2)(x的n次方-2)/x³(x的n次方+3)²×(x的n次方+3)/(x的n次方-2)×1/x(x的n次方+3)=3(x的n次方+2)/x³(x的n次