你如何简化(1 / sqrt(a-1)+ sqrt(a + 1))/(1 / sqrt(a + 1)-1 / sqrt(a-1))div sqrt(a + 1)/( (a-1)sqrt(a + 1) - (a + 1)sqrt(a-1)),a> 1?

你如何简化(1 / sqrt(a-1)+ sqrt(a + 1))/(1 / sqrt(a + 1)-1 / sqrt(a-1))div sqrt(a + 1)/( (a-1)sqrt(a + 1) - (a + 1)sqrt(a-1)),a> 1?
Anonim

回答:

巨大的数学格式……

说明:

#color(蓝色)(((1 / sqrt(a-1)+ sqrt(a + 1))/(1 / sqrt(a + 1)-1 / sqrt(a-1)))/(sqrt(a 1)/((A-1)的sqrt(A + 1) - (A + 1)SQRT(A-1)))#

#=颜色(红色)(((1 / SQRT(A-1)+ SQRT(A + 1))/((SQRT(A-1)-sqrt(A + 1))/(SQRT(A + 1) cdot sqrt(a-1))))/(sqrt(a + 1)/(sqrt(a-1)cdot sqrt(a-1)cdot sqrt(a + 1)-sqrt(a + 1)cdot sqrt(一个+ 1)SQRT(A-1)))#

#=颜色(蓝色)(((1 / SQRT(A-1)+ SQRT(A + 1))/((SQRT(A-1)-sqrt(A + 1))/(SQRT(A + 1) cdot sqrt(a-1))))/(sqrt(a + 1)/(sqrt(a + 1)cdot sqrt(a-1)(sqrt(a-1)-sqrt(a + 1)))#

#= color(red)((1 / sqrt(a-1)+ sqrt(a + 1))/((sqrt(a-1)-sqrt(a + 1))/(sqrt(a + 1)cdot sqrt(a-1)))xx(sqrt(a + 1)cdot sqrt(a-1)(sqrt(a-1)-sqrt(a + 1)))/ sqrt(a + 1)#

#= color(蓝色)((1 / sqrt(a-1)+ sqrt(a + 1))xx((sqrt(a + 1)cdot sqrt(a-1))/(sqrt(a-1) - sqrt(a + 1)))xx(取消((sqrt(a + 1)))cdot sqrt(a-1)(sqrt(a-1)-sqrt(a + 1)))/ cancelsqrt(a + 1) ))#

#= color(red)(((1 + sqrt(a + 1)cdot sqrt(a-1))/(sqrt(a-1)))xx((sqrt(a + 1)cdot sqrt(a-1) ))/(sqrt(a-1)-sqrt(a + 1)))xx sqrt(a-1)cdot(sqrt(a-1)-sqrt(a + 1))#

#= color(蓝色)(((1 + sqrt(a + 1)cdot sqrt(a-1))/ cancel(sqrt(a-1)))xx((sqrt(a + 1)cdot cancel((sqrt) (a-1))))/ color(红色)(取消(颜色(绿色)((sqrt(a-1)-sqrt(a + 1)))))xx sqrt(a-1)cdot颜色(红色) )(取消颜色(绿色)((sqrt(a-1)-sqrt(a + 1)))#

#= color(red)(ul(bar(| color(blue)((1 + sqrt(a + 1)cdot sqrt(a-1))cdot(sqrt((a + 1)(a-1))) )|#

回答:

#sqrt(一个^ 2-1)+一个^ 2-1#

说明:

为了大大简化,我们将使用 #Ù^ 2 = A + 1#·V ^ 2 = A-1#,这给了我们:

#(V ^ -1 + U)/(U ^ -1-V ^ -1)*(UV ^ 2-VU ^ 2)/ U =((V ^ -1 + U)(UV ^ 2-VU ^ 2))/(U(U ^ -1-v ^ -1))=(UV-U ^ 2 +(UV)^ 2-VU ^ 3)/(1-UV ^ -1)=(UV(1 + UV)-u ^ 2(1 + UV))/((VU)/ v)=(UV(1个+ UV)(VU))/(VU)= UV(1个+ UV)#

#uv(1 + UV)= UV + U ^ 2V ^ 2 = SQRT(A-1)的sqrt(A + 1)+(A-1)(A + 1)= SQRT(一个^ 2-1)+一^ 2-1#