If a^2 +1/a^2=7,find the value of ( a+1/a)
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Answered by
1
Answer:
(a+1/a) ²=a²+1/a²+2
(a+1/a) ²=7+2=9=3²
a+1/a=3
Answered by
0
Given,
a² + 1/a² = 7
( a )²+( 1/ a )² + 2 (a) (1 /a )-2(a )(1/a)=7
(a + 1/a )² - 2 (a ) ( 1/ a) = 7
( a + 1 / a )² - 2 = 7
(a + 1/ a )² = 7 + 2
(a + 1 / a )² = 9
(a + 1 / a ) = √9
( a + 1 / a ) = 3
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