Question

For the given AP = 5 , 12 , 19 , 26 .... write the value of a and b

Answer 1

Here

a = 5

d = 7

Thanks

Hope it helps

Answer 2

Step-by-step explanation:

a is the first term which is 5

a=5

common difference 

d=12−5=7

let me guess that the b your refering to is the next term

26+7=33

no.of terms

nth term= a+(n-1)d

= 5+( n-1)7

= 7n-2

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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hope it helps

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