Since $2$ is the only even prime it remains to show that there is no integer $x$ such that $f(x)=2$. That is, the equation $$x^7-105x+10=0$$has no integer solution. Can you take it from here? Recall the Rational Root Theorem.
One of my local clubs has a demo Mizuno 900 tour 6 iron laying around with a 105x in it that I've been able to bring out on course a couple times...but never been able to get on a monitor to look at numbers.
I went from s400 AMT Ti to the modus 105x in my Cobra forged Tec Black irons. I love them. Easy to swing and accurate. Once I adjusted to the lighter weight and dialed in my tempo with them, they have been money. A nice mid flight for me. I actually hit them lower than the modus 120x I used to game a few years ago....
I have them in my i200s. Previously always got on well with S300s and even Recoil 110s. Modus 105x is best of the bunch for me across all metrics...flight, feel, stability, spin, ability to flight down, etc...
I game them in mp18sc and love them. I am coming from KBS Tour 120 and can't imagine going back. During my fitting I tried at least a dozen shafts and it came down to the modus 105x or the 120x. My numbers between the 120x and 105x were extremely similar but slightly more consistent and better dispersion with the 105x and I wanted a lighter shaft
I came from x100 (ss1x) and went straight to Fuji Pro95 x-flex graphite to alleviate some tennis/gofers elbow. Once it got better I tried some Modus 105x and they were a great alternative to my x100 and easier on the joints. Keep in mind my x100 were ss1x and the 105x went straight in.
I use the Modus 105x in my i200s. Six iron speed for me is 90 and I float load a tad. I love these shafts. They are most definitely easier on the hands and elbows than Project X or C-Tapers and they feel terrific. I'd say they're as easy on the joints as the graphite Recoil 110s I have in a set of S55s. I'm a high ball hitter but do not have problems with too much height or spin, and I can flight the ball down with these no problem. I think they actually weigh about 115g in x flex. Your best bet is to shaft a single club and experiment in different conditions.
3.3 Find roots (zeroes) of : F(x) = 4x3 - 50x2 + 105x + 56Polynomial Roots Calculator is a set of methods aimed at finding values of x for which F(x)=0 Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers x which can be expressed as the quotient of two integersThe Rational Root Theorem states that if a polynomial zeroes for a rational number P/Q then P is a factor of the Trailing Constant and Q is a factor of the Leading CoefficientIn this case, the Leading Coefficient is 4 and the Trailing Constant is 56. The factor(s) are: of the Leading Coefficient : 1,2 ,4 of the Trailing Constant : 1 ,2 ,4 ,7 ,8 ,14 ,28 ,56 Let us test .... 041b061a72