Question

find the terms of A.P 5,12,19,26
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Answer 1

Answer:

Here first term a=5 and common difference

d=12−5=7

Suppose nth term of the A.P. is 145

Now, T

n

=a+(n−1)d

∴145=5(n−1)(7)

∴145−5=7(n−1)

∴140=7(n−1)

∴20=n−1∴n=21

Answer 2

Step-by-step explanation:

Here first term a=5 and common difference 

d=12−5=7

Suppose nth term of the A.P. is 145

Now, Tn=a+(n−1)d

∴145=5(n−1)(7)

∴145−5=7(n−1)

∴140=7(n−1)

∴20=n−1∴n=21

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