Question

21. Find a and d for the following AP:

3 /4, 1, 5 /4, 3/2

Solve it very fast ​

Answer 1

Answer:

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(ii) It is in AP with common difference d=25−2=21, 

tn=a+(n−1)d

a=2

t5=2+(5−1)21

Next three terms are 4,29,5

(iii) It is in AP with common difference d=−3.2+1.2=−2 ,and a=−1.2 

Next three terms are 

a+(5−1)d=−9.2,

a+(6−1)d=−11.2,

a+(7−1)d=−13.2

(iv) It is in AP with common difference d=−6+10=4, and 

a=−10

Next three terms are 

a+(5−1)d=6,

a+(6−1)d=10,

a+(7−1)d=14

(v) It is in AP with common difference d=3+2

Answer 2

Step-by-step explanation:

21. Find a and d for the following AP:

3 /4, 1, 5 /4, 3/2

Solve it very fast