Question

16.term of the AP 2, –1, –4, –7, ....... is –40? (a) 8th (b) 15th (c) 11th (d) 23rd
17. Find the sum of first 20 odd natural numbers
18. The third term of an A.P is ‘p’ and the 4th term is ‘q’. Find its 10th term.

Answer 1

Answer:

Step-by-step explanation:

Hope it helps

Answer 2

Answer:

15

Step-by-step explanation:

a=2

d= -1-2=-3

an=a+(n-1)(-3)

-40=2+(n-1)(-3)

-48÷-3=n-1

n=15