Math, asked by ajaydio, 4 months ago

11. Which term of the AP:3, 8, 13, 18.......
.... is 78?​

Answers

Answered by nalanagulajagadeesh
1

Answer:

tn = a +(n-1)d,

=> 78 = 3 + (n-1)5,

=> (n-1)5 = 75,

=> n-1 = 15,

=> n = 16.

therefore,

16th term is 78

Answered by Anonymous
1

Step-by-step explanation:

First of all we find d

so d=a2-a1

d=8-3

d=5

and

an=a+(n-1) d

we have to found

a78=a+(n-1) d

a78=3+(78-1) 5

a78=3+77×5

a78=3+385

a78=388

I hope it helps you........

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