can anyone help me with this code?

Questions
,
1

i keep getting this two errors for my codes.

var1 = graph1[input1];
soln3 = Simplify[ Solve[{il3 == (k((vdd - vin - vt)(vdd - vo[t]) - ((vdd - vo[t])^2/2)) - (k/2(vin)^2)), vin == mt}, il3, {vin}]];

1) Solve was unable to solve the system with inexact coefficients. The answer was obtained by solving a corresponding exact system and numericizing the result. >>

stage2[t] = il3 /. Part[Part[soln3, 1], 1];
soln4 = NDSolve[{vo'[t] == stage2[t]/c0, vo[input1] == var1}, {t, input1, vdd/m}];

2) NDSolve::argm: NDSolve called with 2 arguments; 3 or more arguments are expected. >>

keep getting both warning/ error…

2

The message from Solve isn’t an error, it’s just telling you what it did. If you use NSolve, you won’t see that message.
NDSolve needs the independent variable specified as the second argument.