Questions of WORD PROBLEMS 20 Aug
Question for practice
The following questions are more helpful for class tenth students for all boards.
Questions 12. A number when added to its reciprocal result becomes double of the number. find the number?
Submit your answer here in the comments or wait for answer
let the number be x.
ReplyDeletethen its reciprocal is 1/x.
then x+1/x=2x
or 2x=x+1/x
2x^2=x^2+1
2x^2-x^2=1
x^2=1
x=1
therefore, the number is 1
No
Deletesee here, x^2 = 1
correct answer is 1 or -1.
oh,yes
Deletelet the number be x.
ReplyDeleteso , its reciprocal will be = 1/x
x + 1/x = 2x
x^2+1/x = 2x
x^2+1 = 2x^2
so, 1 = x^2
=> x = 1
No
Deletesee here, x^2 = 1
correct answer is 1 or -1.
Ans. Let the no. be x
ReplyDeletetherefore, its reciprocal = 1/x
x +1/x = 2x
or x^2 +1 /x =2x
or x^2 +1 = 2x^2
or 1 = x^2
or x = 1
therefore, the no. is 1 .
No
Deletesee here, x^2 = 1
correct answer is 1 or -1.
No
ReplyDeletex^2 = 1
correct answer is 1 or -1.
x+1/x=2x
ReplyDelete(x^2 +1)/x=2x
x^2=1 =2x^2
1=2x^2 -x^2
x^2 =1
x=1
let the nmbr be X
ReplyDelete1/x+x =2x
1+x*x=2(x*x)
x*x=1
x= 1 or -1