Evaluate the indefinite integral as a power series.

∫ tan−1(x) / x dx
[infinity]
f(x) = C + Σ
n = 0

What is the radius of convergence R?

Given: ac and db are diameters. m∠3=

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

Ajar of gumballs contains 4 reds, 2 greens, and 6 blues. what is the probability of getting two blues in a row without replacement?