find the 21 term of the A.P 3,7,11,15,
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Answer:
83
Step-by-step explanation:
a=3
d=4
Therfore by formula
an = a+(n-1)d
a21 = 3 +(21-1)4
a21 = 3+(20)×4
a21 = 3+ 80
a21 = 83
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