I hardly understand this type of Geometric Sequences.

Write a recursive sequence that represents the sequence defined by the following explicit formula:

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t