Question

1. Show that the progression 11, 13, 15, 17, 19, ........ is an A.P.
Write down its (i) first term (ii) common difference (iii) 20th term.​

Answer 1

Answer:

a=11. d=13-11=2. T20=a+(n-1)*d 11+19*13=

Step-by-step explanation:

268

Answer 2

Answer:

1. a = 11
2. d = 2
3. n = 49

Step-by-step explanation:

i) a = 11

ii) d = 2nd term - 1st term = 13 - 11 = 2

iii) Tn = a + (n - 1) d

= 11 + (20 - 1) 2

= 11 + (19) 2

= 11 + 38

= 49

I hope it is helpfull to you