Question

the first term of an AP is 5 and command difference is 2 then the 9th term is
A)15
B)20
C)21
D)25​

Answer 1

ANSWER: 21

a = 5 (first term of an AP)

d = 2 (common difference )

an = a +(n-1) d

an = 5 + ( 9-1) 2

= 5 + 8 × 2

= 5 + 16 = 21

Answer 2

Answer:

c

Step-by-step explanation:

an= a+(n-1)*d

an= 5+ (9-1)*2

an=5+16

an= 21