Problema Solution
the sum of two numbers a and b is15. Sum of thier reciprocals 1/a and1/b=3/10
Answer provided by our tutors
a+b=15 therefore a=15-b
1/a+1/b=3/10
therefore a+b/ab=3/10
hence 15/ab=3/10 (sice a+b=15)
hence ab = 50
or (15-b)*b=50
or b2-15b+50=0
therefore by solving the equation we get b=-10 and -5
henhence a =25 or 20