11. Sketch the circles x2 + y2 = 9 and x2 + y2 - 18x + 72 = 0. Find the equation of the
circle whose centre is on the x-axis and which
touches both of these circles:
(i) Externally
(ii) Internally

eevfrtvbvav bwdvfvdvdb

Step-by-step explanation:

sv f g f wb

bottom left

step-by-step explanation:

the x's and the y's both go up the same amount each time, therefore it will be a linear function because it will go in a straight line when drawn on a graph.

hope this !

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2