P th term of an AP is 3P-1/6, then .Find the sum of first n term.
is that 3P - 1/6 or (3P-1)/6 ?
Plug in P=1 for the first term T1
Recall that the sum is
n/2 (T1 + Tn)
now plug and chug
Plug in P=1 for the first term T1
Recall that the sum is
n/2 (T1 + Tn)
now plug and chug