Question

Which term of the A.P. 42, 4.7, 5.2, 5.7............ is 8.7 ?

pls don't spamm
​

Answer 1

The 10th term of the AP will be 8.7

Answer 2

Answer:

8.7 is its 10th term.

Step-by-step explanation:

According to formula for n th term of an A.P.

l=a+(n-1)×d

where,

l is the n th term of an A.P.

a is the first term

n is the number of terms in an A.P.

and d is the difference between any two consecutive terms of an A.P.

Given A.P. is 4.2, 4.7, 5.2, 5.7, ..... 8.7

So according to question ,

8.7 = 4.2 + (n-1) × 0.5

》8.7 - 4.2 = (n-1) × 0.5

》4.5 = (n-1) × 0.5

》4.5 / 0.5 = (n-1)

》9 = n - 1

》n = 10