Question

For a+15d=100,the value of n is _

Answer 1

Answer:Given :-

First term (a) = 15

Common difference (d) = -3

Last term (an) = 0

To Find :-

Number of terms n

Solution :-

an = a + (n - 1 ) d

Putting values

» 0 = 15 + (n - 1)-3

» -15 = -3n + 3

» -15 - 3 = -3n

» -18 = -3n

» -18/-3 = n

» 6 = n

》n = 6

Step-by-step explanation:

Answer 2

Answer:

Value of n is 16

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