Question

8. The formula to find 9th term of an AP is a9 = _____. Fill in the blanks

Answer 1

Answer:

tn=a+(n-1) d

t9=a+(9-1) d

t9=a+(8) d

t9=a+8d

substitute the value of a and d

and the value for t9

Answer 2

Answer:

an=a+(n-1)d

A9=a+(9-1)d

A9=a+8d