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Solution 5). a = 1
d = 5 - 1 = 4
L = 201
=> a + (n-1)d = 201
=> 1 + (n-1)4 = 201
=> (n-1) 4 = 200
=> n - 1 = 50
=> n = 51
51th term of the given AP is 201.
Solution 6.)
a = 6
d = 13 - 6 = 7
L = 216
=> a + (n-1) d = 216
=> 6 + (n-1) 7 = 216
=> (n-1) 7 = 210
=> n - 1 = 30
=> n = 31
Middle term = T16
Middle term = a + 15d
= 6 + 15 × 7
= 6 + 105
= 111
d = 5 - 1 = 4
L = 201
=> a + (n-1)d = 201
=> 1 + (n-1)4 = 201
=> (n-1) 4 = 200
=> n - 1 = 50
=> n = 51
51th term of the given AP is 201.
Solution 6.)
a = 6
d = 13 - 6 = 7
L = 216
=> a + (n-1) d = 216
=> 6 + (n-1) 7 = 216
=> (n-1) 7 = 210
=> n - 1 = 30
=> n = 31
Middle term = T16
Middle term = a + 15d
= 6 + 15 × 7
= 6 + 105
= 111
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