let u = sqrt(x^2 + 1)
d/dx ( tan u ) = du/dx sec^2 u
du/dx = x/sqrt(x^2 + 1)
d/dx (tan u) = x/sqrt(x^2 + 1) times sec^2 (sqrt(x^2 + !)
( I think)
2048
42
4+1=5. Plus 4 equals 9. Plus 77685769844446473 equals 77685769844446482. Plus 3 equals 77685769844446485. Plus 8 equals 77685769844446493. Plus 1 equals 77685769844446494. Plus 9870998342523322424 equals 1064785604097768918. Plus 4 equals 1064785604097768922.
It is the property that equals plus equals are equals.
the answer is a
No.
If I am correct, 9 plus 7 equals 112.
89
26
144
96
42