Plotting a function defined by an integral on HP50

[dizzy]

(05-16-2015 05:46 PM)cdecastro Wrote:  I have a couple of questions relating to graphing and differentiating functions defined by an integral.

First, when I define

y1(x)=int(1,x, 2*t, t)
y2(x)=int(1,x^2, 2*t, t)

I can perform evaluations.i.e. y1(2) and y2(2), of both functions but am not able to graph y2(x); the grapher reports a "Bad Argument" to the integration method for y2(x).

Additionally if I define y3(x) = diff(y1(x),x), nothing appears when graphed.

While I can certainly perform the differentiation prior to defining y3, I wondered why the grapher cannot deal with this issue. With regard to integration, things are trickier if the integrand does not have an antiderivative expressible in elementary terms. Is there a built-in numerical integration method I can call explicitly?

Thanks in advance for your assistance.

Chris

Are you actually using "int"? This function only takes three arguments. Using the integral sign works for me for your y2 function.