Question

(C)
10. Find a formula for the shaded part below, in terms
of p, q and r.
P
9​

Answer 1

Step-by-step explanation:

S=1+i

2

+i

4

+i

6

+...+i

2n

=1−1+1−1+...+(−1)

n

It depends on the value of n. Hence, it cannot be determined unless n is known.