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Grade: 11

                        

If alpha and beta are the roots of equation X square + 3 X + 1 is equal to zero and a n is equal to Alpha power n + beta power n and n where and belongs to natural number and the value of a A7 +A5 ÷A 6 is equal to

2 years ago

Answers : (1)

Arun
24737 Points
							
Dear student
 
A we know
 
x^2 + 3x + 1 = 0
 
Now
 
A7 + A5 / A6 = 
 
Xn+2 + 3Xn+1 + Xn = 0
 
put n = 5
 
A7 + 3A6 + A5 = 0
 
A7  + A5 / A6 = – 3
 
Regards
Arun
2 years ago
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