Find a recurrence relation for the number of strictly increasing sequences of positive integers that have 1 as their first term and n as their last term, where n is a positive integer. that is, sequences a1 , a2 , ak , where a1 = 1, ak = n, and aⱼ < aⱼ ₊ ₁ for j = 1, 2, . . , k − 1.

Step-by-step explanation:

where k>1 and S(1)=1

the correct answer is semicircle

step-by-step explanation:

the answer is semicircle because the shorter arc joining two points on the circumference of a circle is known as the minor arc, the larger arc is called the major arc, and a semicircle is a half circle, formed by cutting a whole circle along a diameter line.

hope i .