a^2+1/a=4
find the value of 2a^3+2/a^3
Answers
Answered by
1
Answer:
104
Step-by-step explanation:
It is given that,
(a² + 1)/a = 4
a²/a+1/a=4(taking lcm and denominator as a)
a+1/a=4
2a³+2/a³ = 2[a³ + 1/a³]
= 2[(a+1/a)³ − 3(a)(1/a)(a + 1/a)] (taking 2 a common)
= 2[(4)³ – 3(4)]
= 2[64 – 12]
= 2(52)
= 104
Answered by
0
Answer:
4
Step-by-step explanation:
a²+1/a=4
(a³+1)/a=4
a³+1=4a
a³=4a-1
2a³+2/a³
2(4a-1)+2/(4a-1)
2+2
4
Similar questions