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X(n-1)/2 X(n+1)/2 (X1+Xn)/2 无法计算
P=πm x PZ =Z πm x q=dl ∕m x P2= (1∕2)Zπm x
3a﹣2a=1 ﹣m﹣m=m2 2x2+2x2=4x4 7x2y3﹣7y3x2=0
6a-5a=1 5x-6x=11x m2-m=m x3+6x3=7x3
M2=体重(kg)X0.035+0.1 M2=身长(cm)X0.035+0.1 M2=年龄(岁)X0.035+0.1 M2=1/2身长(cm)X0.035+0.l M2=1/2年龄(岁)X0.035+0.1
)x2(m+1)÷xm+1=x2 ( )(xy)8÷(xy)4=(xy)2 ( )x10÷(x7÷x2)=x5 ( )x4n÷x2n·x2n=1
X(n-1)/2 X(n+1)/2 (x1+xn)/2 无法计算
4x400m 3x400m+400mx1/4 3x400m+3/4x400m 4x400mx1/2
(m+2)2=m2+4 (3+y)( 3-y)= 9-y2 2x(x-1)= 2x2-1 (m-3)(m+1)= m2-3
X(n-1)/2 X(n+1)/2 (X1+Xn)/2 无法计算
m=3,n=1; m=0,n=0; m=-3,n=-9; m=-3,n=8;
(-p2q)3=-p5q3 (12a2b3c)÷(6ab2)=2ab 3m2÷(3m-1)=m-3m2 (x2-4x)x-1=x-4
(x+1)(x+4)=x2+5x+4 (y+4)(y-5)=y2+9y-20 (m+2)(m-3)=m2-m-6 (x-3)(x-6)=x2-9x+18
(-p2q)3=-p5q3 12a2b3c÷6ab2=2ab 3m2÷(3m-1)=m-3m2 (x2-4x)·x-1=x-4
X(n-1)/2 X(n+1)/2 (x1+xn)/2 无法计算
d 1=da-0.5 m x d 1=da-2mx d 1=da- m x