The (n – 1)th term of an A.P. is given by 7,12,17, 22,
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Answer:
5n - 3
Step-by-step explanation:
a = 7
d = 12 - 7 = 5
A(n) = a + (n - 1) d
A(n - 1) = a + [ ( n - 1 ) - 1 ] d
A ( n - 1) = a + ( n - 1 - 1) d
= a + ( n -2 ) d
= 7 + 5n - 10
= 5n - 3
hope it helped
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