设a,b,x,y满足ax+by=3,ax2+by2=7,ax3+by3=16,ax4+bx4=42,求ax5+by5=?
设a,b,x,y满足ax+by=3,ax2+by2=7,ax3+by3=16,ax4+bx4=42,求ax5+by5=?
已知:ax+by=7 ax2+by2=49 ax3+by3=133 ax4+by4=406 求1995(x+y)+6xy
(1)已知x=2,y=-4时,代数式ax3+12by+5=1997,求当x=−4,y=−12时,代数式3ax-24by3
设(2x-1)5=ax5+bx4+cx3+dx2+ex+f,
求函数的奇偶性f(x)=ax5+bx4+cx3+ex4+f为奇函数、为偶函数
已知(x+2)5=ax5+bx4+cx3+dx2+ex+f,则16b+4d+f=( )
若(3x+1)5=ax5+bx4+cx3+dx2+ex+f,则a-b+c-d+e-f的值是______.
若(3x+1)5=ax5+bx4+cx3+dx2+ex+f,则a-b+c-d+e-f的值是( )
已知:a,b∈R+,a+b=1,求证:ax2+by2≥(ax+by)2.
已知多项式2ax4+5ax3-13x2-x4+2021+2x+bx3-bx4-13x3是二次多项式,则a2+b2=___
已知函数fx=ax4·inx+bx4-c在x=1处有极值-3-c 1,求a.b 2.求单调区间 3.若任意x大于0 不等
已知ax3=by3=cz3,且1x+1y+1z=1.