If a1=7and an=-2an1 then find the value of a5
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Answer:
Step-by-step explanation:
since the foci is (±5,0), the standard form of the hyperbola would be
directics = ±a^2/c
±2 = ±a^2/5
a^2 = 10
a^2+b^2=c^2
b^2 = c^2-a^2 =5^2-10 = 15