Question

72+76+80+......+440 A.P​

Answer 1

Answer:

d=4(76-72)

Tn=a+(n-1) d

440= 72 + ( n-1) 4

440=72 + 4n-4

372=4n

n= 372/4=93

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Answer 2

Step-by-step explanation:

= first digit A=72

= the common difference=76-72=4

Nth term (an) =a+( n-1)d

= 72+(n-1)4 =440

= ( n-1)4=440-72

= (n-1) 4 = 368

= n-1 = 368/4

= n-1 = 92

= n = 92+1

= n = 93