问题描述:
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1 how many prime numbers p are there such that 199p+1 is a perfect square?
A 0 B 1 C 2 D 4 E 8
2 HOW MANY PAIRS OF REAL NUMBERS (X,Y) SATISFY THE EQUATION (X+Y)^2=(X+3)(Y-3)
A 0 B 1 C 2 D 4 E infinitely many
3 What is the area of the polygon formed by all points (x,y) in the plane satisfying the inequality //x/-2/+//y/-2/
1 how many prime numbers p are there such that 199p+1 is a perfect square?
A 0 B 1 C 2 D 4 E 8
2 HOW MANY PAIRS OF REAL NUMBERS (X,Y) SATISFY THE EQUATION (X+Y)^2=(X+3)(Y-3)
A 0 B 1 C 2 D 4 E infinitely many
3 What is the area of the polygon formed by all points (x,y) in the plane satisfying the inequality //x/-2/+//y/-2/
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