Question

Tentukan panjang jari jari dan diameter berikut A.4x²+4y²=1 B.6–8x²–8y²=0 C.5x²=7–5y²

Answer 1

A. 4x²+4y²=1
x²+y² = 1/4
r²=1/4
r=1/2, d=1
B. 6-8x²-8y²=0
8x²+8y²=6
x²+y²=6/8
r²=6/8
r= √(3/4) = (√3)/2
d= √3
C. 5x²=7-5y²
5x²+5y²=7
x²+y²=7/5
r²= 7/5
r= √(7/5) √(7)/√(5) = (√35) /5
d= (2√35)/5