Question

If a=5 and 11th term of A.P is 45, then find 'd' ?
Explain in steps please ​

Answer 1

Answer:

d = 4

Step-by-step explanation:

a =5

a 11 = 45

a + 10d = 45

substituting value of a,

5 + 10d = 45

10d = 45 - 5

10d = 40

d = 40/10

d = 4

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Answer 2

$a = 5 \\ \\ t \: 11 = 45 \\ \\ a + (n - 1)d = 45 \\ \\ 5 + (11 - 1)d = 45 \\ \\ 10d = 45 - 5 \\ \\ 10d = 40 \\ \\ d = \frac{40}{10} \\ \\ \boxed{d = 4}$