Question

10. If the last term of the AP 5.3.1.-1...is -41, then the AP consists of​

Answer 1

Answer:

here the 1st term a=5

co mmon difference d=3-5= -2

let -41 is the nth term

then,

a+(n-1).d= -41

=> 5+(n-1).(-2)= -41

=> (n-1)(-2)= -41-5= -46

=> n-1= -46/-2

=> n-1=23

=> n=23+1

=> n=24

so, the series consist of 24 terms