(2的N+4次方减以2乘2的N次方)除以2乘以2的N加3次方如题 谢谢了
(2的N+4次方减以2乘2的N次方)除以2乘以2的N加3次方如题 谢谢了
=(2^(n+4)-2^(n+1))/2^(n+4)=1-2^(n+1)/2^(n+4)=1-1/8=7/8
2的n+4次方-2*2的n次方除以2乘以2的n+2次方
2的n+4次方-2*2的n次方除以2乘以2的n+2次方
=2的n+4次幂- 2的n次幂×2的n+2次幂
=2的n+4次幂-2的n+4次幂
=0
6乘以2的n+3次方分之2的n+4次方减8乘以2的n次方
(6乘以2的n+3次方)分之(2的n+4次方减8乘以2的n次方)
=(6乘以2的n+3次方)分之(2×2的n+3次方减2的n+3次方)
=(6乘以2的n+3次方)分之(2的n+3次方)
=6分之1
-2的2n+2次方乘以4的n次方乘以8的n次方
=(-1)2n+2次方*2的2n+2次方*4的n次方* [(2*4)的n次方]
=1* [2的2*(n+1)方]*4的n次方*4的n次方*2的n次方
=4的(n+1)次方*4的n次方*4的n次方* [4的(1/2)次方]的n次方
=4的(3n+1)次方* [4的(1/2)n次方]
=4的[(7/2)n+1]次方
计算:2的n+3次方减16乘2的n次方除以2乘2的n+2次方
[2^(n+3)-16*2^n]÷2*2^(n+2)
=[2^(n+3)-(2^4)*2^n]÷2^(n+3)
=[2^(n+3)-2^(n+4)]÷2^(n+3)
=[2^(n+3)-2*2^(n+3)]÷2^(n+3)
=2^(n+3)(1-2)÷2^(n+3)
=-2^(n+3)÷2^(n+3)
=-1
化简分式,【x的(2n+3)次方+(8乘x的2n次方)】除以【x的(n+4)次方+(4乘x的(n+2)次方)+16乘x的n次
【x的(2n+3)次方+(8乘x的2n次方)】除以【x的(n+4)次方+(4乘x的(n+2)次方)+16乘x的n次方】
=(X^2n*x^3+8*x^2n)除以(x^n*x^4+4*x^n*x^2+16x^n)
=x^2n(x^3+8)除以x^n(x^4+4x^2+16)
=x^n(x^3+8)/(x^4+4x^2+16)
已是最简整式,无法继续化简
化简:[2的n+4次方-2*2的n次方]除以2*2的n+3次方.得
[2^(n+4)-2*2^n]/2*2^(n+3)
=[2^(n+4)-2^(n+1)]/2^(n+4)
=1-2^(n+1)]/2^(n+4)
=1-1/2^3=7/8
4乘2的n次方乘以4乘2的n次方
=2^(n+2)*2^(n+2)
=2^(2n+4)
已知2乘以4的n次方乘以8的n次方乘以16的n次方=2的19次方,求2n次方的值.
把原式分解为
2*(2*2)^n*(2*2*2)^n*(2*2*2*2)^n=2^19
2*2^2n*2^3n*2^4n=2^19
2^1+2n+3n+4n=2^19
1+2n+3n+4n=19
9n=18
n=2
所以2的n次方为4
2乘以4的N次方乘以8的2N次方等于2的25次方,请问N的值?谢谢
2乘以4的N次方乘以8的2N次方
=(2^1)(2^2n)(2^6n)
=2^(1+2n+6n)
=2^(1+8n)
所以1+8n=25
所以n=3