the first two term of A.P. is -5 and 6 find 21 at term
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Given:
a ( First Term ) = -5
a2 ( Second Term ) = 6
n ( Number of Terms ) = 21
d ( Common Difference ) = 11
To Find:
The 21st term of the A.P.
Formula:
an = a + ( n - 1 )d
Solution:
a21 = -5 + ( 21 - 1 )11
a21 = -5 + 220
a21 = 215
Answer:
(d) 215 is the correct answer.
215 is the 21st term of the A.P.
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