Question

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

Answer 1

Step-by-step explanation:

78=3+(n-1)5

78=3+5n-5

n=80/5

=16

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Answer 2

Answer:

16

Step-by-step explanation:

First let's find the common difference (8-3=5)

Now A/Q

General term=first term+(n-1) *d

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

=>78=3+5n-5

=>78=5n-2

=>78+2=5n

=>80=5n

=>16=n

therefore 16th term will be 78