(2.52 - 2.25) x 10^5 = .27 x 10^5 = 2.7 x 10^4 27,000 Miles difference
For an INFINITE series the sum S
S = a1/ (1-r) where r is the common ratio (1/8)
60 = a1 / (1-1/8)
60 x (7/8) = a1 = 52.5
The exact value of WHAT? The angle? (don't know) The cosine? (-3/5)
3/4 15 300 6000 120000 2,400,000 48, 000, 000
n = 1 2 3 4 5 6 7
48 million IS evenly divisible by 1,000,000 so n = 7
48 cm^9 whatever that is
Absolutely.....it is good to have a lot of 'tools' in the chest !
+-sqrt(-4ac) / 2a seems awful simple.....I did it in my head....
Actually, since there is no 'b' term the quadratic formula is very easy to use !
169 ^(1/2) is sqrt (169)
169^(-1/2) is 1 / sqrt(169) = 1/13
2x^2 - 6 = 0
2x^2 - (0)x -6 =0 is a quadratic equation ...use quadratic formula to find
x= +-\(\sqrt{3}\)
Quadratic Formula:
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)
