In arithmetic sequence 7,10,13,16,..., which term is 40?

show how you solve please ​


Sagot :

Answer:

using the formula :

an = a1 + (n-1)d

an = a1 + (n-1) d

a⁴⁰ = 7 +(40 -1 ) 3

a⁴⁰ = 7 +( 39 ) 3

a⁴⁰ = 7+ 117

a⁴⁰ = 124

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