Check whether 51 is a term of ap 5,8,11,14
Answers
given:-a=5 and d= 3 An=51
An=a+(n-1)d
51=5+(n-1)3 51=5+3n-3 51-2=3n 49/3=n n=1.63.. since n can't beintegers 51 is not in the term of ap 5,8,11,14...
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GIVEN :
The A.P is 5,8,11,14,......
From this ,
The first term, a = 5
The common difference , d = t2 - t1
d = 8 - 5
d = 3
TO FIND :
Whether 51 is the term of the AP.
SOLUTION:
The general term,tn
where n is the nth term.
tn = a + ( n - 1 ) d
51 = 5 + ( n - 1 ) 3
51 = 5 + 3n - 3
51 = 3n + 2
3n = 51 - 2
3n = 49
n = 49/3 ( fraction )
Since n is a fraction,,,, 51 does not belong to this AP
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