2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8的解集
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2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8的解集
2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8的解集
2sin(πx/4-π/4)+6<2sin(πx/4-3π/4)+8的解集
sin(πx/4-π/4)-sin(πx/4-3π/4)
十字相乘
x'2n-5x'n-24
=(x'n-8)(x'n+3)
x=3
y=4
所以P(3,4)
旋转90度即垂直
所以斜率是-1
所以y-4=-(x-3)
即y=-x+7
(x²y)的2n次方
=x的4n次方×y的2n次方
=(x的n次方)的4次方×(y的n次方)²
=16×9
=144