Question

the 21th term of the AP whose first two terms are -3 and 4 is

Answer 1

Answer:

21

Step-by-step explanation:

EQUASION

Answer 2

First term, a = -3

Second term = 4

=> Common difference = First term - Second term

=> d = 4-(-3) = 7

T21 = a + (n-1)d

= -3 + (21-1)4

= -3 + (20)(4)

= -3 + 80

= 77