If x= (7+4√3),then (x+1/x)=
obtion a,48
b,49
c,14
d,8√3
Answers
Answered by
0
answer is option c, 14
Step-by-step explanation:
x+1/x=x²+1/x ( cross multiplication)
Now substitute the given value of x i.e.,(7+4√3)
=>(7+4√3)²+1/7+4√3
[a+b]²=a²+b²+2ab..Here a=7,b=4√3
7²+(4√3)²+2×7×4√3 + 1 /7+4√3
=>49+48+56√3+1/7+4√3
=>98+56√3/7+4√3
[ take common √3 from numerator and denominator]
=>√3(98+56)/√3(7+4)
98+56/7+4
154/11
=14
Hope it helped you..Stay home stay safe...Have a nice day dear..☺️
Answered by
0
Answer:
correct answer is c 14....
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