Write sqrt(50) in the form Asqrt(50) where A is an integer
Note that sqrt(ab)=sqrt(a)sqrt(b)
Thus to have A, an integer, we must find the highest number 'a' that is a square number and is also a factor of 50.
So, a=25 and b=2 (ab=25x2=50)
and we have:
sqrt(50) = sqrt(25)sqrt(2) = 5sqrt(2) (A = 5)
BP
Related Maths A Level answers
All answers ▸A medical test will be positive for 0.05% of people and negative for everyone else. Suppose a hospital will test 4000 patients each day. Use an appropriate approximation to find the probability that 5 people test positive tomorrow. (5SF)
How do I write the function 3cosθ+4sinθ in the form Rsin(θ + α), where R and α are positive constants?
What is the gradient of this curve y=5x^3+6x^2+7x+8 at point x=3?
Given y=2x(x^2-1)^5, show that dy/dx = g(x)(x^2-1)^4 where g(x) is a function to be determined.