64 lines
525 B
Plaintext
64 lines
525 B
Plaintext
ans
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15311
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$\dfrac\pi 4$
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15312
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$2\sqrt{5}$
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15313
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$x+2y-3=0$
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15314
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$8$
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15315
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$6$
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15316
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$m<-1$
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15317
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$3$
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15318
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$-\dfrac 34$
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15319
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$2$
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15320
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$x^2+y^2=16$
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15321
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$\dfrac{R-r}{R+r}$
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15322
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$1$
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15323
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D
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15324
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B
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15325
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A
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15326
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D
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15327
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(1) $\dfrac 13$; (2) $-1$或$2$
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15328
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(1) $3x+4y=25$; (2) $x=3$或$7x-24y+75=0$
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15329
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(1) $y^2=4x$; (2) $\sqrt{5}$
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15330
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(1) $\dfrac{x^2}8-\dfrac{y^2}4=1$; (2) $\dfrac{(2x-3)^2}8-y^2=1$; (3) $3-2\sqrt{2}$
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15331
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(1) $\dfrac{x^2}4+\dfrac{y^2}3=1$; (2) $\sqrt{3}$; (3) $(\dfrac 43,0)$
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