Question

If 7 th term of an Ap is 35 and it's 9th term is 45 . find it's 60 term

Answer 1

Answer:

a60 = 300

Step-by-step explanation:

let the first term of an A.P. is 'a'

and 'd' is the common difference

∴ a7 = a + 6d  

35 = a + 6d              -----(1)

a9 = a + 8d            

45 = a + 8d                -----(2)

subtract eq. 1 from 2 we get

d  = 5

put the value of 'd' in eq. 1 we get 'a' = 5

∴ a60 = a + 59d

a60 = 5 + 59 × 5

a60 = 300

Answer 2

Answer:

60th ter is 300

For explanation, see the attached file

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