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Find the 18th term of the A.P. 4, 7, 10,...

Find the 18th term of the A.P. 4, 7, 10, ....

Text Solution

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Here, a = 4,
d = 7 - 4 = 10 - 7 = 3,
n = 18
`:. a_(n)=a+(n-1)d`
`rArr a_(18)=4+(18-1)xx3=4+51=55`
`:.` 18th term of the given A.P. = 55.
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