48,301* . 51,702 you wrote the number incorrectly
I got 7.5 but you might want to double check that
Recall that for |<em>x</em>| < 1, we have
Differentiating both sides gives
and multiplying both sides by 8 gives the series for <em>f(x)</em> :
and this converges over the same interval, |<em>x</em>| < 1, so that the radius of convergence is 1.
Answer: 6
Step-by-step explanation: a + 2b + 3 c = a + 2b + 3c