Question

the 9th term of an AP is 449 and 449th term is 9. find the term which is equal to 300​

Answer 1

Answer:

the correct answer is 458th term....

Answer 2

158th term of the AP is 300

Step-by-step explanation:

t9=449

a+8d=449------(1)

t449=9

a+448d=9------(2)

a+8d=449

a+448d=9

Change the sign

-440d=440

d= -1

Substitute in any one equation

a+8d=449

a+8×-1=449

a-8=449

a=457

tn=300

a+(n-1)d=300

457+(n-1)-1=300

457-1n+1=300

458-1n=300

Shift -n to the other side

n=458-300

n=158