Medal!! Question Below!!
can you see the attachment?
@Data_LG2
@freckles
hi
Hi :)
\[\text{ Let } F(x)=\int\limits_{1}^{a(x)} g(t) dt \\ \text{ so assume } G'=g \\ \text{ anyways } F(x)=G(t)|_1^{a(x)}=G(a(x))-G(1) \\ \text{ for first term use chain rule } \\ \text{ second term use constant rule } \\ F'(x)=a'(x)G'(a(x))-0 \\ F'(x)=a'(x)g(a(x))\]
you can differentiate your integral in a similar way
notice your g(t) is sqrt(t^2+1) and your a(x) is 4x
a'(x)=?
wait do you plug it into x?
I was currently just asking for a'(x) given a(x)=4x
\[F(x)=\int\limits_1^{4x} \sqrt{t^2+1} dt \\ F'(x)=a'(x)g(a(x)) \text{ where } g(t)=\sqrt{t^2+1} \text{ and } a(x)=4x\]
you will plug 4x into g(t)=sqrt(t^2+1) but you also need to differentiate (4x)
8x^2+4x - 3/2
the derivative of 4x is 8x^2+4x-3/2? how did you get that?
Picture the line y=4x what is the slope of the line y=4x?
the slope is 4
right the derivative of 4x is 4.. \[F(x)=\int\limits\limits_1^{4x} \sqrt{t^2+1} dt \\ F'(x)=a'(x)g(a(x)) \text{ where } g(t)=\sqrt{t^2+1} \text{ and } a(x)=4x \\ F'(x)=(4x)'g(4x)=4g(4x)\] last thing to do is replace the t in sqrt(t^2+1) with (4x)
\[F'(x)=4 \sqrt{(4t)^2+1}\]
oops that t is suppose to be x
but anyways i think you got it from here
if not i will be back after i eat
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